Fix create/edit dates generated by github workflows.

Author: leMaik

.github/workflows/gh-pages-deploy.yaml

@@ -7,7 +7,9 @@ jobs:
   deploy:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
       - uses: actions/setup-python@v2
         with:
           python-version: 3.12

.github/workflows/pr-build.yaml

@@ -13,9 +13,9 @@ jobs:
   preview:
     runs-on: ubuntu-latest
     steps:
-      - name: Checkout PR
-        uses: actions/checkout@v2
-
+      - uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
       - name: Install Python
         uses: actions/setup-python@v2
         with: