build: Bump GitHub Actions (Same changes as #7704)

Author: tenkoma

.github/workflows/ci.yml

@@ -20,7 +20,9 @@ jobs:
         doc-type: ['HTML', 'EPUB', 'PDF']
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v4
+
+    - uses: actions/setup-python@v5
       with:
         fetch-depth: 1
 

.github/workflows/deploy_2x.yml

@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Cloning repo
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
         with:
           fetch-depth: 0