Better GitHub Actions task name.

Author: postmodern

.github/workflows/ruby.yml

@@ -24,7 +24,7 @@ jobs:
         uses: actions/setup-python@v4
         with:
           python-version: 3.8
-      - name: Install python dependencies
+      - name: Install yamllint
         run: |
           python -m pip install --upgrade pip
           pip install yamllint