fix: no Python in container, reverting to awk

.gitea/workflows/update-readme.yaml

@@ -20,22 +20,17 @@ jobs:
           FORMATTED_LOC=$(printf "%'d" $LOC)
           echo "Syncing $FORMATTED_LOC lines..."
 
-          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 + '$FORMATTED_LOC' + marker_end + after
-              with open('README.md', 'w') as f:
-                  f.write(new_content)
-              print('Successfully updated README.')
-          else:
-              print('Markers not found!')
-              exit(1)
-          "
+          awk -v new_val="$FORMATTED_LOC" '
+            /.*/ {
+              sub(/.*/, "" new_val "")
+            }
+            { print }
+          ' README.md > README.md.tmp && mv README.md.tmp README.md
+
+          if [ $(wc -l < README.md) -lt 5 ]; then
+            echo "ERROR: AWK output looks too small. Guarding against corruption."
+            exit 1
+          fi
 
       - name: Commit and Push
         run: |