Updated the documentation to make it clear after spending some time.

 Addressing the issue - #4626

Signed-off-by: lrangine <19699092+lokeshrangineni@users.noreply.github.com>

Author: lokeshrangineni

sdk/python/feast/repo_config.py

@@ -158,9 +158,9 @@ class RepoConfig(FeastBaseModel):
     """Repo config. Typically loaded from `feature_store.yaml`"""
 
     project: StrictStr
-    """ str: Feast project id. This can be any alphanumeric string up to 16 characters.
+    """ str: This acts as a unique project identifier. This can be any alphanumeric string up to 16 characters and can have '_' but can not start with '_'.
         You can have multiple independent feature repositories deployed to the same cloud
-        provider account, as long as they have different project ids.
+        provider account, as long as they have different project identifier.
     """
 
     provider: StrictStr = "local"