chore(deps): bump actions/setup-go from 4 to 6

Bumps [actions/setup-go](https://github.com/actions/setup-go) from 4 to 6.
- [Release notes](https://github.com/actions/setup-go/releases)
- [Commits](actions/setup-go@v4...v6)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/integration-test.yml

@@ -15,7 +15,7 @@ jobs:
       uses: actions/checkout@v4
 
     - name: Set up Go
-      uses: actions/setup-go@v4
+      uses: actions/setup-go@v6
       with:
         go-version: '1.24'
 

.github/workflows/release-builder.yml

@@ -26,7 +26,7 @@ jobs:
         run: echo "RELEASE_VERSION=${RELEASE_VERSION%-krew}" >> $GITHUB_ENV
 
       - name: Set up Go
-        uses: actions/setup-go@d35c59abb061a4a6fb18e82ac0862c26744d6ab5 # v5.5.0
+        uses: actions/setup-go@19bb51245e9c80abacb2e91cc42b33fa478b8639 # v4.2.1
         with:
           go-version: '1.24.3'