Update link to CMVP certificate.

NIST redid their website and broke all the old links.

Change-Id: I5b7cba878404bb63e49f221f6203c8e1e6545af4
Reviewed-on: https://boringssl-review.googlesource.com/26204
Reviewed-by: Adam Langley <agl@google.com>
diff --git a/crypto/fipsmodule/FIPS.md b/crypto/fipsmodule/FIPS.md
index 8378f1b..a691d18 100644
--- a/crypto/fipsmodule/FIPS.md
+++ b/crypto/fipsmodule/FIPS.md
@@ -8,7 +8,7 @@
 
 BoringCrypto has undergone the following validations:
 
-1. 2017-06-15: certificate [#2964](http://csrc.nist.gov/groups/STM/cmvp/documents/140-1/1401val2017.htm#2964), [security policy](/crypto/fipsmodule/policydocs/BoringCrypto-Security-Policy-20170615.docx) (in docx format).
+1. 2017-06-15: certificate [#2964](https://csrc.nist.gov/Projects/Cryptographic-Module-Validation-Program/Certificate/2964), [security policy](/crypto/fipsmodule/policydocs/BoringCrypto-Security-Policy-20170615.docx) (in docx format).
 
 ## Running CAVP tests