fix: misnamed arguments in error message (#121)

Author: foolip

lib/index.js

@@ -71,8 +71,8 @@ function throttlingPlugin (octokit, octokitOptions = {}) {
 
         const octokit = new Octokit({
           throttle: {
-            onAbuseLimit: (error, options) => {/* ... */},
-            onRateLimit: (error, options) => {/* ... */}
+            onAbuseLimit: (retryAfter, options) => {/* ... */},
+            onRateLimit: (retryAfter, options) => {/* ... */}
           }
         })
     `)