fix: improve logging around failed cumulative updates

Author: dhensby

src/utils.ts

@@ -194,9 +194,12 @@ export async function downloadUpdateInstaller(config: VersionConfig): Promise<st
             if (link) {
                 downloadLink = link;
             }
+            core.info('Unable to find download link in body');
+            core.debug(body);
         }
         if (!downloadLink) {
             core.warning('Unable to download cumulative updates');
+            core.info(`Response code: ${res.message.statusCode}`);
             return '';
         }
     }