docs: update StreamableHTTPConnectionParams docstring to remove SSE references (#1456)

Co-authored-by: Terrence Ryan <tpryan@google.com>
Fixes: google/adk-docs#475

Author: bl3ck

src/google/adk/tools/mcp_tool/mcp_session_manager.py

@@ -85,9 +85,9 @@ class SseConnectionParams(BaseModel):
 
 
 class StreamableHTTPConnectionParams(BaseModel):
-  """Parameters for the MCP SSE connection.
+  """Parameters for the MCP streamable HTTP connection.
 
-  See MCP SSE Client documentation for more details.
+  See MCP streamable HTTP Client documentation for more details.
   https://github.com/modelcontextprotocol/python-sdk/blob/main/src/mcp/client/streamable_http.py
 
   Attributes: