fix(releases): add required octokit throttling rate limit handlers

When throttle is enabled in Octokit, the plugin requires onRateLimit
and onSecondaryRateLimit handlers. Without them, the releases widget
crashes with an error when fetching GitHub/DockerHub release data.

Fixes #6309

packages/request-handler/src/release-providers.ts

@@ -134,7 +134,21 @@ const getGithubApi = (baseUrl: string, userAgent: string, token?: string) =>
     baseUrl,
     auth: token,
     request: { fetch: fetchWithTrustedCertificatesAsync },
-    throttle: { enabled: true },
+    throttle: {
+      enabled: true,
+      onRateLimit: (retryAfter: number, options: { url?: string; method?: string }) => {
+        logger.warn(`GitHub rate limit exceeded, retrying after ${retryAfter}s`, {
+          url: options.url,
+          method: options.method,
+        });
+      },
+      onSecondaryRateLimit: (retryAfter: number, options: { url?: string; method?: string }) => {
+        logger.warn(`GitHub secondary rate limit exceeded, retrying after ${retryAfter}s`, {
+          url: options.url,
+          method: options.method,
+        });
+      },
+    },
     userAgent,
   });