fix: check if lastActivity is “truthy”

We do this rather than checking that it’s not an empty string to make sure we capture the case where it might be undefined.

Signed-off-by: Zee V. (Philip) <zee@vall.in>

plugins/catalog-backend-module-gitlab/src/GitLabDiscoveryProcessor.ts

@@ -110,7 +110,7 @@ export class GitLabDiscoveryProcessor implements CatalogProcessor {
     };
 
     const lastActivity = (await this.cache.get(this.getCacheKey())) as string;
-    if (lastActivity !== '') {
+    if (lastActivity) {
       opts.last_activity_after = lastActivity;
     }