Bump crazy-max/ghaction-import-gpg from 3 to 5 (#3922)

* Bump crazy-max/ghaction-import-gpg from 3 to 5

Bumps [crazy-max/ghaction-import-gpg](https://github.com/crazy-max/ghaction-import-gpg) from 3 to 5.
- [Release notes](https://github.com/crazy-max/ghaction-import-gpg/releases)
- [Changelog](https://github.com/crazy-max/ghaction-import-gpg/blob/master/CHANGELOG.md)
- [Commits](https://github.com/crazy-max/ghaction-import-gpg/compare/v3...v5)

---
updated-dependencies:
- dependency-name: crazy-max/ghaction-import-gpg
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

* Adjust for new version

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Igor Pečovnik <igorpecovnik@users.noreply.github.com>

.github/workflows/update-cache.yml

@@ -248,12 +248,12 @@ jobs:
           clean: false
 
       - name: Import GPG key
-        uses: crazy-max/ghaction-import-gpg@v3
+        uses: crazy-max/ghaction-import-gpg@v5
         with:
-          gpg-private-key: ${{ secrets.GPG_KEY1 }}
+          gpg_private_key: ${{ secrets.GPG_KEY1 }}
           passphrase: ${{ secrets.GPG_PASSPHRASE1 }}
           workdir: build
-          git-user-signingkey: true
+          git_user_signingkey: true
 
       - name: Install SSH key for storage
         uses: shimataro/ssh-key-action@v2