ci(installer-iso): drop --title (not supported by livemedia-creator)

livemedia-creator failed with 'unrecognized arguments: --title' — that
flag is livecd-creator-only. Use --volid for the ISO volume label.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

.github/workflows/build-installer-iso.yml

@@ -64,13 +64,15 @@ jobs:
           set -euxo pipefail
           mkdir -p build/out /var/lmc
           ln -sfn "$GITHUB_WORKSPACE" /work
+          # livemedia-creator does NOT support --title (that's livecd-creator).
+          # --volid replaces it for the ISO volume label.
           livemedia-creator \
             --make-iso \
             --no-virt \
             --ks kickstart/install-ostreecontainer-installer.ks \
             --resultdir build/out \
             --tmp /var/lmc \
-            --title "veilor-os" \
+            --volid "veilor-os-installer-${RELEASEVER}" \
             --project "veilor-os" \
             --releasever "$RELEASEVER" \
             --logfile build/out/build.log \