docs: fix spelling error in response_for_auth_required parameter docstring

Merge google#2680

COPYBARA_INTEGRATE_REVIEW=google#2680 from dunnkers:docs/fix-spelling-error-in-parameter-docstring 39782ac
PiperOrigin-RevId: 827163203

Author: dunnkers

src/google/adk/tools/authenticated_function_tool.py

@@ -58,7 +58,7 @@ def __init__(
           the tool doesn't configure any credentials
           (auth_config.raw_auth_credential is missing) or the credentials
           configured is not enough to authenticate the tool (e.g. an OAuth
-          client id and client secrect is configured.) and needs client input
+          client id and client secret are configured) and needs client input
           (e.g. client need to involve the end user in an oauth flow and get
           back the oauth response.)
     """

src/google/adk/tools/base_authenticated_tool.py

@@ -57,7 +57,7 @@ def __init__(
           the tool doesn't configure any credentials
           (auth_config.raw_auth_credential is missing) or the credentials
           configured is not enough to authenticate the tool (e.g. an OAuth
-          client id and client secrect is configured.) and needs client input
+          client id and client secret are configured) and needs client input
           (e.g. client need to involve the end user in an oauth flow and get
           back the oauth response.)
     """