Bump actions/cache from v1 to v2.1.4

Bumps [actions/cache](https://github.com/actions/cache) from v1 to v2.1.4.
- [Release notes](https://github.com/actions/cache/releases)
- [Commits](actions/cache@v1...26968a0)

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

.github/workflows/scala.yml

@@ -19,19 +19,19 @@ jobs:
       - uses: actions/checkout@v2
 
       - name: Cache jabba
-        uses: actions/cache@v1
+        uses: actions/cache@v2.1.4
         with:
           path: ~/.jabba
           key: ${{ runner.os }}-jabba-cache-${{ hashFiles('**/workflows/scala.yml') }}
 
       - name: Cache SBT ivy cache
-        uses: actions/cache@v1
+        uses: actions/cache@v2.1.4
         with:
           path: ~/.ivy2/cache
           key: ${{ runner.os }}-sbt-ivy-cache-${{ hashFiles('**/build.sbt') }}
 
       - name: Cache SBT
-        uses: actions/cache@v1
+        uses: actions/cache@v2.1.4
         with:
           path: ~/.sbt
           key: ${{ runner.os }}-sbt-${{ hashFiles('**/build.sbt') }}