Fix pathlib usage

integrate_into_manifest.py

@@ -48,7 +48,7 @@ def integrate_into_manifest(
 
         # Parse manifest file
         try:
-            manifest = etree.parse(manifest_filepath)
+            manifest = etree.parse(manifest_filepath.as_posix())
         except FileNotFoundError:
             sys.exit("ERROR: file '%s' not found in manifest repo" % manifest_file)
 
@@ -83,11 +83,9 @@ def integrate_into_manifest(
         # We are doing this using a plain text replace action. Unfortunately
         # all python libraries for handling XML data are not able to preserve
         # the file layout, and we want a minimal diff.
-        with open(manifest_filepath, "r") as file:
-            content = file.read()
+        content = manifest_filepath.read_text()
         content = content.replace(old_revision, new_revision)
-        with open(manifest_filepath, "w") as file:
-            file.write(content)
+        manifest_filepath.write_text(content)
 
         # Make an API request to create the gitlab.user object
         gitlab.auth()