refactor: rename internal appId variable to clientId

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

lib/main.js

@@ -2,7 +2,7 @@ import pRetry from "p-retry";
 // @ts-check
 
 /**
- * @param {string} appId
+ * @param {string} clientId
  * @param {string} privateKey
  * @param {string} owner
  * @param {string[]} repositories
@@ -13,7 +13,7 @@ import pRetry from "p-retry";
  * @param {boolean} skipTokenRevoke
  */
 export async function main(
-  appId,
+  clientId,
   privateKey,
   owner,
   repositories,
@@ -70,7 +70,7 @@ export async function main(
   }
 
   const auth = createAppAuth({
-    appId,
+    appId: clientId,
     privateKey,
     request,
   });