Fix outdated comment in fiat METADATA file

After https://boringssl-review.googlesource.com/c/boringssl/+/75852, we
started using LICENSE-APACHE instead of LICENSE-MIT.

Change-Id: I889154950c876ed37fce7cfcdf7c866685d9cfca
Reviewed-on: https://boringssl-review.googlesource.com/c/boringssl/+/98347
Reviewed-by: Lily Chen <chlily@google.com>
Auto-Submit: David Benjamin <davidben@google.com>
Commit-Queue: David Benjamin <davidben@google.com>
Commit-Queue: Lily Chen <chlily@google.com>

third_party/fiat/METADATA

diff --git a/third_party/fiat/METADATA b/third_party/fiat/METADATA
index 339fe5f..a3a55c9 100644
--- a/third_party/fiat/METADATA
+++ b/third_party/fiat/METADATA
@@ -9,5 +9,5 @@
   version: "6ccc6638716d4632304baf1adbb5c47c3a12ea6f"
   last_upgrade_date { year: 2022 month: 3 day: 22 }
 
-  local_modifications: "Files renamed to .h for BoringSSL integration. LICENSE file is LICENSE-MIT from upstream."
+  local_modifications: "Files renamed to .h for BoringSSL integration. LICENSE file is LICENSE-APACHE from upstream."
 }