fix(python-sdk): updated docs for pyproject_toml flag

Author: aditya-arolkar-swe

fern/products/sdks/overview/python/configuration.mdx

@@ -133,7 +133,18 @@ groups:
 </ParamField>
 
 <ParamField path="pyproject_toml" type="string" default="null" required={false} toc={true}>
-Path to a custom `pyproject.toml` template file to use instead of the default generated one.
+Allow specifying arbitrary configuration to your packages `pyproject.toml` by adding a `pyproject_toml` block to your configuration
+        whatever you include in this block will be added as-is to the `pyproject.toml` file. The config, as an example is:
+        ```yaml
+        config:
+          pyproject_toml: |
+            [tool.covcheck.group.unit.coverage]
+            branch = 26.0
+            line = 62.0
+            [tool.covcheck.group.service.coverage]
+            branch = 30.0
+            line = 67.0
+        ```
 </ParamField>
 
 <ParamField path="should_generate_websocket_clients" type="bool" default="false" required={false} toc={true}>