chore: update comment

Author: swaroop-osec

generate_dockerfiles.py

@@ -67,7 +67,7 @@
 CMD /bin/bash
 """
 
-# Skipping these because the are not valid releases or where yanked
+# Skipping these because the are not valid releases or where yanked or not released for mainnet
 SKIPPED_VERSIONS = {
     "v1.15", "v1.14.0", "v1.10.0", "v1.10.16", "v1.10.18",
     "v1.10.27", "v1.10.36", "v1.10.37", "v1.11.7", "v1.11.8", "v1.11.9",