build: bump actions/setup-go from 5 to 6 (#254)

* build: 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] <support@github.com>

* ci: Update Go version for shellcheck

---------

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

Author: dependabot[bot]

.github/workflows/clang-format-image.yml

@@ -84,7 +84,7 @@ jobs:
     name: Clean untagged images
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/setup-go@v5
+      - uses: actions/setup-go@v6
         with:
           go-version: '^1.22'
           check-latest: true

.github/workflows/shell-lint.yml

@@ -25,9 +25,9 @@ jobs:
 
     steps:
     - uses: actions/checkout@v5
-    - uses: actions/setup-go@v5
+    - uses: actions/setup-go@v6
       with:
-        go-version: '1.22'
+        go-version: '1.25'
         check-latest: true
     - name: Install shfmt
       run: go install mvdan.cc/sh/v3/cmd/shfmt@latest