build(deps): bump actions/cache from 5 to 6

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/operator-cd.yml

@@ -26,7 +26,7 @@ jobs:
         go-version-file: go.mod
 
     - name: Cache dependencies
-      uses: actions/cache@v5
+      uses: actions/cache@v6
       with:
         path: ~/go/pkg/mod
         key: ${{ runner.os }}-go-${{ hashFiles ('**/go.sum') }}

.github/workflows/publish-components-for-e2e-tests.yml

@@ -56,7 +56,7 @@ jobs:
         go-version-file: go.mod
 
     - name: Cache dependencies
-      uses: actions/cache@v5
+      uses: actions/cache@v6
       with:
         path: ~/go/pkg/mod
         key: ${{ runner.os }}-go-${{ hashFiles ('**/go.sum') }}