fix(deps): update dependency google-auth to ~=2.40.0 (#1145)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

pyproject.toml

@@ -88,7 +88,7 @@ dev = [
   "types-requests==2.32.0.20250328"
 ]
 google-onetap = [
-  "google-auth~=2.39.0"
+  "google-auth~=2.40.0"
 ]
 ping = [
   "python-jose>=3.4.0,<4.0"