chore: Fix spelling: there are

Signed-off-by: Josh Soref <[email protected]>

Author: jsoref

src/google/adk/code_executors/code_execution_utils.py

@@ -126,7 +126,7 @@ def extract_code_and_truncate_content(
     if not content or not content.parts:
       return
 
-    # Extract the code from the executable code parts if there're no associated
+    # Extract the code from the executable code parts if there are no associated
     # code execution result parts.
     for idx, part in enumerate(content.parts):
       if part.executable_code and (