try

src/github.ts

@@ -1,7 +1,6 @@
 import { context, getOctokit } from '@actions/github';
 import * as core from '@actions/core';
 import { Await } from './ts';
-import { createAppAuth } from "@octokit/auth-app";
 
 let octokitSingleton: ReturnType<typeof getOctokit>;
 
@@ -17,6 +16,7 @@ type Tag = {
 };
 
 export async function getOctokitSingleton() {
+  const { createAppAuth } = await import("@octokit/auth-app");
   const auth = createAppAuth({
     privateKey: process.env.PRIVATE_KEY || '',
     clientId: process.env.CLIENT_ID || '',

src/tsconfig.json

@@ -0,0 +1,9 @@
+{
+    "compilerOptions": {
+      "target": "ES2022",
+      "module": "ES2022",
+      "moduleResolution": "node",
+      "allowSyntheticDefaultImports": true,
+      "esModuleInterop": true
+    }
+  }

tsconfig.json

@@ -1,11 +0,0 @@
-{
-  "compilerOptions": {
-    "target": "es6",
-    "module": "commonjs",                     /* Concatenate and emit output to single file. */
-    "outDir": "./lib",                        /* Redirect output structure to the directory. */
-    "rootDir": "./src",
-    "strict": true,
-    "esModuleInterop": true
-  },
-  "exclude": ["node_modules", "**/*.test.ts"]
-}