fix documentation build error

Author: Alami-Amine

docs/guides/BUILDING.md

@@ -404,7 +404,8 @@ Tests will be located in:
     [Running FuzzTests](../testing/fuzz_testing.md#running-fuzztests)
 
 FAQ: In the event of a build failure related to missing files or dependencies
-for pw_fuzzer, check the [FuzzTest FAQ](../testing/fuzz_testing.md#FAQ)
+for pw_fuzzer, check the
+[FuzzTest FAQ](../testing/fuzz_testing.md#fuzz-testing-faq)
 
 ## Build custom configuration
 

docs/testing/fuzz_testing.md

@@ -256,6 +256,7 @@ $ ./fuzz-chip-cert-pw --fuzz=ChipCert.DecodeChipCertFuzzer
 
 ```
 
+(fuzztest-faq)=
 ### FAQ
 
 #### What revision should the FuzzTest and Abseil submodules be for running `pw_fuzzer` with FuzzTest?