ci(release): explicitly specify files to commit (#2304)

Explicitly add files to commit after updating the version number and generating the changelog. Previously we used 'git add -A'. As of git-cliff-action@v4 this includes the git-cliff binary and related content which is apparently installed to the working directory.

Author: wpbonelli

.github/workflows/release.yml

@@ -120,7 +120,7 @@ jobs:
           git config core.sharedRepository true
           git config user.name "github-actions[bot]"
           git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
-          git add -A
+          git add flopy docs .docs CITATION.cff README.md version.txt 
           git commit -m "ci(release): set version to ${{ steps.version.outputs.version }}, update plugins from DFN files, update changelog"
           git push origin "${{ github.ref_name }}"