Add link to new Android FIPS certificate.

Change-Id: I6dabeb0a9090a4ddcafc88a3bc53b2c28c30f14a
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/51465
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
diff --git a/crypto/fipsmodule/FIPS.md b/crypto/fipsmodule/FIPS.md
index 3a733a8..9b58ab3 100644
--- a/crypto/fipsmodule/FIPS.md
+++ b/crypto/fipsmodule/FIPS.md
@@ -12,6 +12,7 @@
 1. 2018-07-30: certificate [#3318](https://csrc.nist.gov/Projects/Cryptographic-Module-Validation-Program/Certificate/3318), [security policy](/crypto/fipsmodule/policydocs/BoringCrypto-Security-Policy-20180730.docx) (in docx format).
 1. 2019-08-08: certificate [#3678](https://csrc.nist.gov/Projects/Cryptographic-Module-Validation-Program/Certificate/3678), [security policy](/crypto/fipsmodule/policydocs/BoringCrypto-Security-Policy-20190808.docx) (in docx format).
 1. 2019-10-20: certificate [#3753](https://csrc.nist.gov/Projects/Cryptographic-Module-Validation-Program/Certificate/3753), [security policy](/crypto/fipsmodule/policydocs/BoringCrypto-Android-Security-Policy-20191020.docx) (in docx format).
+1. 2021-01-28: certificate [#4156](https://csrc.nist.gov/Projects/Cryptographic-Module-Validation-Program/Certificate/4156).
 
 ## Running ACVP tests