refactor: remove git-tag job's guard conditions

These guard conditions are now superfluous because the `git-tag` job depends on the `releases` job.

PR: #43

.github/workflows/containers.yml

@@ -271,14 +271,11 @@ jobs:
     needs:
     - tags
     - releases
-    if: ${{ startsWith(github.ref, 'refs/tags') }}
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
         uses: actions/checkout@v2
-        if: ${{ github.ref == format('refs/tags/{0}', needs.tags.outputs.release-trigger) }}
       - name: Tag
-        if: ${{ github.ref == format('refs/tags/{0}', needs.tags.outputs.release-trigger) }}
         env:
           TAG: ${{ needs.tags.outputs.major-minor }}
         run: |