Googletest export

Update stale links to `gmock_cook_book.md`.

I'm a new googletest user and found these links broken when reading the documentation.

PiperOrigin-RevId: 357786392

googlemock/src/gmock-spec-builders.cc

@@ -295,8 +295,8 @@ void ReportUninterestingCall(CallReaction reaction, const std::string& msg) {
               "call should not happen.  Do not suppress it by blindly adding "
               "an EXPECT_CALL() if you don't mean to enforce the call.  "
               "See "
-              "https://github.com/google/googletest/blob/master/googlemock/"
-              "docs/cook_book.md#"
+              "https://github.com/google/googletest/blob/master/docs/"
+              "gmock_cook_book.md#"
               "knowing-when-to-expect for details.\n",
           stack_frames_to_skip);
       break;