🩹 fix deprecation warning:

   The ubuntu-18.04 environment is deprecated,
   consider switching to ubuntu-20.04(ubuntu-latest), or ubuntu-22.04 instead.
   For more details see actions/runner-images#6002

.github/workflows/run.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
   run:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     steps:
       - uses: actions/checkout@master