Bump actions/setup-go from 5 to 6

Bumps [actions/setup-go](https://github.com/actions/setup-go) from 5 to 6.
- [Release notes](https://github.com/actions/setup-go/releases)
- [Commits](actions/setup-go@v5...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/ci.yaml

@@ -43,7 +43,7 @@ jobs:
           GOLANG_VERSION=$( grep "GOLANG_VERSION ?=" versions.mk )
           echo "GOLANG_VERSION=${GOLANG_VERSION##GOLANG_VERSION ?= }" >> $GITHUB_ENV
       - name: Install Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: ${{ env.GOLANG_VERSION }}
       - run: make validate-csv
@@ -58,7 +58,7 @@ jobs:
           GOLANG_VERSION=$( grep "GOLANG_VERSION ?=" versions.mk )
           echo "GOLANG_VERSION=${GOLANG_VERSION##GOLANG_VERSION ?= }" >> $GITHUB_ENV
       - name: Install Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: ${{ env.GOLANG_VERSION }}
       - run: make validate-helm-values
@@ -81,7 +81,7 @@ jobs:
           echo "GOLANG_VERSION=${GOLANG_VERSION##GOLANG_VERSION ?= }" >> $GITHUB_ENV
           echo "GOLANGCI_LINT_VERSION=${GOLANGCI_LINT_VERSION##GOLANGCI_LINT_VERSION ?= }" >> $GITHUB_ENV
       - name: Install Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: ${{ env.GOLANG_VERSION }}
       - name: Lint
@@ -113,7 +113,7 @@ jobs:
           GOLANG_VERSION=$( grep "GOLANG_VERSION ?=" versions.mk )
           echo "GOLANG_VERSION=${GOLANG_VERSION##GOLANG_VERSION ?= }" >> $GITHUB_ENV
       - name: Install Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: ${{ env.GOLANG_VERSION }}
       - name: Setup Go Proxy
@@ -148,7 +148,7 @@ jobs:
           GOLANG_VERSION=$( grep "GOLANG_VERSION ?=" versions.mk )
           echo "GOLANG_VERSION=${GOLANG_VERSION##GOLANG_VERSION ?= }" >> $GITHUB_ENV
       - name: Set up Go
-        uses: actions/setup-go@v5
+        uses: actions/setup-go@v6
         with:
           go-version: ${{ env.GOLANG_VERSION }}
       - name: Setup Go Proxy