Chore: Update dependencies.yaml triggers (#128)

Signed-off-by: Matthew Watkins <mwatkins@linuxfoundation.org>

.github/workflows/dependencies.yaml

@@ -2,18 +2,21 @@
 # SPDX-License-Identifier: Apache-2.0
 # SPDX-FileCopyrightText: 2024 The Linux Foundation <https://linuxfoundation.org>
 
-name: "♻️ Update Dependencies"
+name: "♻️ [D] Update Dependencies"
 
 # yamllint disable-line rule:truthy
 on:
   workflow_dispatch:
   schedule:
     - cron: "0 8 1 * *"
-  push:
-    branches:
-      - "**"
-      - "!update-devops-tooling"
-      - "!**/update-pdm-lock"
+  # push:
+  #   branches:
+  #     - "**"
+  #     - "!update-devops-tooling"
+  #     - "!**/update-pdm-lock"
+
+env:
+  python-version: 3.11
 
 jobs:
   repository:
@@ -44,6 +47,8 @@ jobs:
 
       - name: "Set up Python"
         uses: actions/setup-python@v5
+        with:
+          python-version: ${{ env.python-version }}
 
       - name: "Update Python dependencies"
         uses: pdm-project/update-deps-action@v1.9