[fxbug.dev] Migrate bug numbers

This changes fxbug.dev/ URLs from Monorail bug numbers to the new
Fuchsia Issue Tracker numbers.

The migration to the new issue tracker was announced here:
https://groups.google.com/a/fuchsia.dev/g/announce/c/GOYfJozEqmk/m/qsGsaJ7UAAAJ

Bug: 298074672
Change-Id: Ib4ddfeb1546c775df9e8f30a08244cd914b3f165
Reviewed-on: https://fuchsia-review.googlesource.com/c/third_party/freetype2/+/980263
Reviewed-by: Ian McKellar <ianloic@google.com>
diff --git a/BUILD.gn b/BUILD.gn
index 7773bdc..297af76 100644
--- a/BUILD.gn
+++ b/BUILD.gn
@@ -30,7 +30,7 @@
   include_dirs = [ "include" ]
   cflags = [ "-Wno-macro-redefined" ]
 
-  # TODO(fxbug.dev/128274): freetype2 has a lot of instances of this type of
+  # TODO(fxbug.dev/42078767): freetype2 has a lot of instances of this type of
   # UB. We should come back and fix these. Disabling this check here though
   # doesn't change anything since it wasn't until recently that this check was
   # extended to cover C, so these bugs were already here.