Googletest export

Fix a link to the guide for creating custom matchers.

PiperOrigin-RevId: 262572684
diff --git a/googlemock/docs/for_dummies.md b/googlemock/docs/for_dummies.md
index 9107282..ad00ada 100644
--- a/googlemock/docs/for_dummies.md
+++ b/googlemock/docs/for_dummies.md
@@ -375,7 +375,7 @@
 the same as `Eq(100)` and `Eq(50)`, which specify that the argument must be
 equal (using `operator==`) to the matcher argument. There are many
 [built-in matchers](#MatcherList) for common types (as well as
-[custom matchers](#NewMatchers)); for example:
+[custom matchers](cook_book.md#NewMatchers)); for example:
 
 ```cpp
 using ::testing::Ge;