Encourage the use of a more specific author email address

Dockerfile

@@ -10,7 +10,13 @@ ARG VERSION
 #
 # Note: Additional labels are added by the build workflow.
 ###
-LABEL org.opencontainers.image.authors="mark.feldhousen@cisa.dhs.gov"
+# github@cisa.dhs.gov is a very generic email distribution, and it is
+# unlikely that anyone on that distribution is familiar with the
+# particulars of your repository.  It is therefore *strongly*
+# suggested that you use an email address here that is specific to the
+# person or group that maintains this repository; for example:
+# LABEL org.opencontainers.image.authors="vm-fusion-dev-group@trio.dhs.gov"
+LABEL org.opencontainers.image.authors="github@cisa.dhs.gov"
 LABEL org.opencontainers.image.vendor="Cybersecurity and Infrastructure Security Agency"
 
 ###