update: change GitHub Actions workflow to use Python

.gitea/workflows/update-readme.yaml

@@ -18,15 +18,24 @@ jobs:
         run: |
           LOC=$(grep '"total_code"' public/code-stats.json | sed 's/[^0-9]*//g')
           FORMATTED_LOC=$(printf "%'d" $LOC)
-          
-          if ! grep -q "" README.md; then
-            echo "ERROR: Could not find markers in README.md. Aborting."
-            exit 1
-          fi
+          echo "Syncing $FORMATTED_LOC lines..."
 
-          echo "Detected $FORMATTED_LOC lines. Updating anchored markers..."
-
-          sed -i "s/.*/$FORMATTED_LOC/" README.md
+          python3 -c "
+          import os
+          content = open('README.md').read()
+          marker_start = ''
+          marker_end = ''
+          if marker_start in content and marker_end in content:
+              before = content.split(marker_start)[0]
+              after = content.split(marker_end)[1]
+              new_content = before + marker_start + '$FORMATTED_LOC' + marker_end + after
+              with open('README.md', 'w') as f:
+                  f.write(new_content)
+              print('Successfully updated README.')
+          else:
+              print('Markers not found!')
+              exit(1)
+          "
 
       - name: Commit and Push
         run: |