Bump actions/cache from 2 to 4

Bumps [actions/cache](https://github.com/actions/cache) from 2 to 4.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v2...v4)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/starfish-prod-ci.yml

@@ -22,7 +22,7 @@ jobs:
         with:
           python-version: 3.9
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ${{ env.pythonLocation }}
           key: ${{ runner.OS }}-${{ env.pythonLocation }}-${{ hashFiles('requirements/REQUIREMENTS-CI.txt') }}
@@ -52,7 +52,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ${{ env.pythonLocation }}
           key: ${{ runner.OS }}-${{ env.pythonLocation }}-${{ hashFiles('requirements/REQUIREMENTS-CI.txt') }}
@@ -82,7 +82,7 @@ jobs:
         with:
           python-version: ${{ matrix.python-version }}
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ${{ env.pythonLocation }}
           key: ${{ runner.OS }}-${{ env.pythonLocation }}-${{ hashFiles('requirements/REQUIREMENTS-CI.txt') }}
@@ -169,7 +169,7 @@ jobs:
         with:
           python-version: 3.9
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ${{ env.pythonLocation }}
           key: ${{ runner.OS }}-${{ env.pythonLocation }}-${{ hashFiles('requirements/REQUIREMENTS-CI.txt') }}
@@ -194,7 +194,7 @@ jobs:
         with:
           python-version: 3.9
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ${{ env.pythonLocation }}
           key: ${{ runner.OS }}-${{ env.pythonLocation }}-${{ hashFiles('requirements/REQUIREMENTS-CI.txt') }}
@@ -219,7 +219,7 @@ jobs:
         with:
           python-version: 3.9
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ${{ env.pythonLocation }}
           key: ${{ runner.OS }}-${{ env.pythonLocation }}-${{ hashFiles('requirements/REQUIREMENTS-CI.txt') }}
@@ -244,7 +244,7 @@ jobs:
         with:
           python-version: 3.9
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ${{ env.pythonLocation }}
           key: ${{ runner.OS }}-${{ env.pythonLocation }}-${{ hashFiles('requirements/REQUIREMENTS-CI.txt') }}
@@ -269,7 +269,7 @@ jobs:
         with:
           python-version: 3.9
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ${{ env.pythonLocation }}
           key: ${{ runner.OS }}-${{ env.pythonLocation }}-${{ hashFiles('requirements/REQUIREMENTS-CI.txt') }}
@@ -294,7 +294,7 @@ jobs:
         with:
           python-version: 3.9
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ${{ env.pythonLocation }}
           key: ${{ runner.OS }}-${{ env.pythonLocation }}-${{ hashFiles('requirements/REQUIREMENTS-CI.txt') }}
@@ -319,7 +319,7 @@ jobs:
         with:
           python-version: 3.9
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ${{ env.pythonLocation }}
           key: ${{ runner.OS }}-${{ env.pythonLocation }}-${{ hashFiles('requirements/REQUIREMENTS-CI.txt') }}
@@ -344,7 +344,7 @@ jobs:
         with:
           python-version: 3.9
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ${{ env.pythonLocation }}
           key: ${{ runner.OS }}-${{ env.pythonLocation }}-${{ hashFiles('requirements/REQUIREMENTS-CI.txt') }}
@@ -369,7 +369,7 @@ jobs:
         with:
           python-version: 3.9
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ${{ env.pythonLocation }}
           key: ${{ runner.OS }}-${{ env.pythonLocation }}-${{ hashFiles('requirements/REQUIREMENTS-CI.txt') }}
@@ -394,7 +394,7 @@ jobs:
         with:
           python-version: 3.9
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ${{ env.pythonLocation }}
           key: ${{ runner.OS }}-${{ env.pythonLocation }}-${{ hashFiles('requirements/REQUIREMENTS-CI.txt') }}
@@ -419,7 +419,7 @@ jobs:
         with:
           python-version: 3.9
 
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: ${{ env.pythonLocation }}
           key: ${{ runner.OS }}-${{ env.pythonLocation }}-${{ hashFiles('requirements/REQUIREMENTS-CI.txt') }}