Errata links have changed

From http://rhn.redhat.com/errata/RHSA-2021-2278.html to https://access.redhat.com/errata/RHSA-2021:2278

bin/bsmailusers

@@ -222,8 +222,7 @@ do
       					ADVTYPE='[?]'
       					ADVTYPE2='[?]'
     				fi
-    				ADVID2=${ADVID/:/-}
-    				ADVURL="http://rhn.redhat.com/errata/$ADVID2.html"
+    				ADVURL="https://access.redhat.com/errata/$ADVID"
     				echo "<tr><td>$ADVTYPE2</td><td>$FILE</td><td><a href=\"$ADVURL\" target=\"secadv\">$ADVID</a></td><td>&nbsp;</td></tr>" >> $ADV
     				echo "    $FILE $ADVTYPE" >> $MAIL
   			else