Rename `Set up Git user` step to `Set up Git`

The step no longer only configures the committer identity, it also
exports `GIT_AUTHOR_DATE`.

Assisted-By: Claude Fable 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01A4jy56QVeduMJcpkryJQpG

.github/workflows/deploy-release-reusable.yaml

diff --git a/.github/workflows/deploy-release-reusable.yaml b/.github/workflows/deploy-release-reusable.yaml
index e4e2074..6360f1f 100644
--- a/.github/workflows/deploy-release-reusable.yaml
+++ b/.github/workflows/deploy-release-reusable.yaml
@@ -82,7 +82,7 @@
           server-password: NEXUS_PASSWORD
           gpg-private-key: ${{ secrets.GPG_SECRET_KEY }}
 
-      - name: Set up Git user
+      - name: Set up Git
         shell: bash
         run: |
           # Set up user name and email required for `git commit`
@@ -147,7 +147,7 @@
             fi
           }
           update_property revision "$PROJECT_VERSION" "Set version to \`$PROJECT_VERSION\`"
-          # `GIT_AUTHOR_DATE` is exported by the `Set up Git user` step
+          # `GIT_AUTHOR_DATE` is exported by the `Set up Git` step
           update_property project.build.outputTimestamp "$GIT_AUTHOR_DATE" "Update the \`project.build.outputTimestamp\` property"
           git push -f origin