Make url optional (#19851)

* Make url optional

Symlinks dont have url in GH response.

* Bump llama-index-readers-github version

Author: ingwarsw

llama-index-integrations/readers/llama-index-readers-github/llama_index/readers/github/repository/github_client.py

@@ -50,7 +50,7 @@ class GitTreeObject(DataClassJsonMixin):
         mode: str
         type: str
         sha: str
-        url: str
+        url: Optional[str] = None
         size: Optional[int] = None
 
     sha: str

llama-index-integrations/readers/llama-index-readers-github/pyproject.toml

@@ -26,7 +26,7 @@ dev = [
 
 [project]
 name = "llama-index-readers-github"
-version = "0.8.1"
+version = "0.8.2"
 description = "llama-index readers github integration"
 authors = [{name = "Your Name", email = "[email protected]"}]
 requires-python = ">=3.9,<4.0"