Fix indexing Github, Notion content by linking embeddings model on init

src/khoj/processor/content/github/github_to_entries.py

@@ -20,6 +20,7 @@ magika = Magika()
 
 class GithubToEntries(TextToEntries):
     def __init__(self, config: GithubConfig):
+        super().__init__(config)
         raw_repos = config.githubrepoconfig.all()
         repos = []
         for repo in raw_repos:

src/khoj/processor/content/notion/notion_to_entries.py

@@ -47,6 +47,7 @@ class NotionBlockType(Enum):
 
 class NotionToEntries(TextToEntries):
     def __init__(self, config: NotionConfig):
+        super().__init__(config)
         self.config = NotionContentConfig(
             token=config.token,
         )