Fixed tag association failing if tag is missing.

src/tags.js

@@ -76,7 +76,7 @@ function withRelations(queryBuilder, withMedia) {
 async function matchReleaseTags(releases) {
 	const tags = releases
 		.map((release) => release.tags).flat()
-		.map((tag) => tag.trim().toLowerCase())
+		.map((tag) => tag?.trim().toLowerCase())
 		.filter(Boolean);
 
 	const tagEntries = await knex('tags')