scripts/release-notes.pl: strip ci skip tag [ci skip]

Ref: e604a82cae (commitcomment-85637701)

Reviewed-by: Daniel Stenberg

Closes #9634

scripts/release-notes.pl

@@ -123,6 +123,7 @@ for my $l (@gitlog) {
     elsif(($l =~ /^    (.*)/) && !$first) {
         # first line
         $short = $1;
+        $short =~ s/ ?\[(ci skip|skip ci)\]//g;
         $first = 1;
         push @line, $short;
     }