fix(ci): always run documentation commit on release

The `if` guard on the "Commit and push changes" step compared `github.ref`
to `refs/heads/<default_branch>`, but the Release workflow triggers only on
tag pushes (`on: push: tags: 'v*'`), so `github.ref` is always
`refs/tags/vX.Y.Z` and never a branch ref — the condition can never be true.

Before 36fa8b6 the guard used mixed `${{ }}` interpolation inside literal
text, which GitHub Actions evaluates as a non-empty (truthy) string, so the
step always ran (by accident). Rewriting it with `format()` turned it into a
proper boolean that is always false on tag-triggered runs, silently skipping
the documentation commit since v6.0.3.

The job only runs on `v*` tag pushes (gated by build-release's repository
guard) and the checkout already targets the default branch, so the guard is
unnecessary. Remove it so the docs commit runs on every release.

Author: jerome-benoit

.github/workflows/release.yml

@@ -131,7 +131,6 @@ jobs:
           pnpm typedoc
 
       - name: Commit and push changes
-        if: ${{ github.ref == format('refs/heads/{0}', github.event.repository.default_branch) }}
         env:
           COMMIT_MESSAGE: 'docs: publish documentation'
           COMMIT_AUTHOR: Documentation Bot