ci: Note affected clangs in comment on ASLR quirk

Resolves bitcoin-core#1506.

Author: real-or-random

.github/actions/run-in-docker-action/action.yml

@@ -37,6 +37,8 @@ runs:
         cache-from: type=gha
 
     - # Workaround for https://github.com/google/sanitizers/issues/1614 .
+      # The underlying issue has been fixed in clang 8.1.3.
+
       run: sudo sysctl -w vm.mmap_rnd_bits=28
       shell: bash