Bump step-security/harden-runner from 2.7.0 to 2.8.1 (#516)

Bumps [step-security/harden-runner](https://github.com/step-security/harden-runner) from 2.7.0 to 2.8.1.
- [Release notes](https://github.com/step-security/harden-runner/releases)
- [Commits](step-security/harden-runner@63c24ba...17d0e2b)

---
updated-dependencies:
- dependency-name: step-security/harden-runner
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/ci.yaml

@@ -10,7 +10,7 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - uses: step-security/harden-runner@63c24ba6bd7ba022e95695ff85de572c04a18142 # v2.7.0
+      - uses: step-security/harden-runner@17d0e2bd7d51742c71671bd19fa12bdc9d40a3d6 # v2.8.1
         with:
           egress-policy: audit
 

.github/workflows/fast-forward.yaml

@@ -17,7 +17,7 @@ jobs:
       issues: write
 
     steps:
-      - uses: step-security/harden-runner@63c24ba6bd7ba022e95695ff85de572c04a18142 # v2.7.0
+      - uses: step-security/harden-runner@17d0e2bd7d51742c71671bd19fa12bdc9d40a3d6 # v2.8.1
         with:
           egress-policy: audit
 

.github/workflows/heroku.yaml

@@ -17,7 +17,7 @@ jobs:
       || (contains(github.event.comment.body, '/refresh-heroku-status') && github.event.issue.pull_request) }}
 
     steps:
-      - uses: step-security/harden-runner@63c24ba6bd7ba022e95695ff85de572c04a18142 # v2.7.0
+      - uses: step-security/harden-runner@17d0e2bd7d51742c71671bd19fa12bdc9d40a3d6 # v2.8.1
         with:
           egress-policy: audit
 
@@ -45,7 +45,7 @@ jobs:
 
     # Check that the deployed app returns successful HTTP response.
     steps:
-      - uses: step-security/harden-runner@63c24ba6bd7ba022e95695ff85de572c04a18142 # v2.7.0
+      - uses: step-security/harden-runner@17d0e2bd7d51742c71671bd19fa12bdc9d40a3d6 # v2.8.1
         with:
           egress-policy: audit
 

.github/workflows/scorecard.yml

@@ -31,7 +31,7 @@ jobs:
       # actions: read
 
     steps:
-      - uses: step-security/harden-runner@63c24ba6bd7ba022e95695ff85de572c04a18142 # v2.7.0
+      - uses: step-security/harden-runner@17d0e2bd7d51742c71671bd19fa12bdc9d40a3d6 # v2.8.1
         with:
           egress-policy: audit