fix(ci): setup-python v6.3.0 + runner fallback

Author: 88plug

.github/workflows/pages.yml

@@ -27,13 +27,13 @@ concurrency:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ${{ vars.RUNNER || 'ubuntu-latest' }}
     steps:
       - name: Check out repository
         uses: actions/checkout@v7.0.0
 
       - name: Install Python
-        uses: actions/setup-python@v6.2.0
+        uses: actions/setup-python@v6.3.0
         with:
           python-version: "3.13"
 
@@ -56,7 +56,7 @@ jobs:
 
   deploy:
     needs: build
-    runs-on: ubuntu-latest
+    runs-on: ${{ vars.RUNNER || 'ubuntu-latest' }}
     environment:
       name: github-pages
       url: ${{ steps.deployment.outputs.page_url }}

.github/workflows/plugin-validate.yml

@@ -7,12 +7,12 @@ permissions:
   contents: read
 jobs:
   validate:
-    runs-on: ubuntu-latest
+    runs-on: ${{ vars.RUNNER || 'ubuntu-latest' }}
     steps:
       - uses: actions/checkout@v7.0.0
       - name: Install zsh (for shell-portability checks)
         run: sudo apt-get update -qq && sudo apt-get install -y -qq zsh
-      - uses: actions/setup-python@v6.2.0
+      - uses: actions/setup-python@v6.3.0
         with:
           python-version: "3.13"
       - run: pip install --quiet pyyaml