Fix path for SHA generation output in PR checks workflow

Author: FMorschel

.github/workflows/pr-to-stable.yaml

@@ -28,8 +28,8 @@ jobs:
 
       - name: Generate SHA of lib/ folder
         run: |
-          (cd new_version/lib && find . -type f -exec sha1sum {} \; | sort | sha1sum | awk '{print $1}') > ../lib_folder.sha
-          cat ../lib_folder.sha
+          (cd new_version/lib && find . -type f -exec sha1sum {} \; | sort | sha1sum | awk '{print $1}') > lib_folder.sha
+          cat lib_folder.sha
 
       - name: Generate SHA of pubspec.yaml
         run: |