Trim title before insert/update to database to match the size requirements of database (#32498)

Fix #32489

models/repo/release.go

@@ -156,6 +156,7 @@ func IsReleaseExist(ctx context.Context, repoID int64, tagName string) (bool, er
 
 // UpdateRelease updates all columns of a release
 func UpdateRelease(ctx context.Context, rel *Release) error {
+	rel.Title, _ = util.SplitStringAtByteN(rel.Title, 255)
 	_, err := db.GetEngine(ctx).ID(rel.ID).AllCols().Update(rel)
 	return err
 }