Bump actions/cache from 5.0.5 to 6.1.0

Bumps [actions/cache](https://github.com/actions/cache) from 5.0.5 to 6.1.0.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@27d5ce7...55cc834)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: 6.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/ci.yaml

@@ -161,7 +161,7 @@ jobs:
       with:
         go-version-file: "go.mod"
     - name: Cache ko build cache
-      uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae  # v5.0.5
+      uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9  # v6.1.0
       with:
         path: /tmp/ko-cache
         key: ${{ runner.os }}-${{ runner.arch }}-ko-${{ hashFiles('go.sum') }}

.github/workflows/e2e-matrix.yml

@@ -33,7 +33,7 @@ jobs:
         with:
           go-version-file: "go.mod"
       - name: Cache ko build cache
-        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae  # v5.0.5
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9  # v6.1.0
         with:
           path: /tmp/ko-cache
           key: ${{ runner.os }}-${{ runner.arch }}-ko-${{ hashFiles('go.sum') }}