fix(gitlab): drop empty entries when splitting release milestones

Trailing/extra commas in the milestones input (e.g. "v1, ,v2") would
produce an empty string entry, which the GitLab API rejects.

Author: waleedlatif1

apps/sim/blocks/blocks/gitlab.ts

@@ -1196,7 +1196,10 @@ Return ONLY the commit message - no explanations, no extra text.`,
               ref: params.ref?.trim() || undefined,
               releasedAt: params.releasedAt?.trim() || undefined,
               milestones: params.releaseMilestones
-                ? params.releaseMilestones.split(',').map((title: string) => title.trim())
+                ? params.releaseMilestones
+                    .split(',')
+                    .map((title: string) => title.trim())
+                    .filter(Boolean)
                 : undefined,
             }