fix: Update storage.Blob.from_string() to from_uri()

Fixes #382

Author: holtskinner

google/cloud/documentai_toolbox/utilities/gcs_utilities.py

@@ -142,7 +142,7 @@ def get_blob(
     if not re.match(constants.FILE_CHECK_REGEX, gcs_uri):
         raise ValueError("gcs_uri must link to a single file.")
 
-    return storage.Blob.from_string(gcs_uri, _get_storage_client(module=module))
+    return storage.Blob.from_uri(gcs_uri, _get_storage_client(module=module))
 
 
 def split_gcs_uri(gcs_uri: str) -> Tuple[str, str]: