ci: update github actions and machine image

Author: grzuy

.github/workflows/ci.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-22.04
     env:
       MIX_ENV: test
     strategy:
@@ -23,7 +23,7 @@ jobs:
               otp: 26.2
             lint: lint
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v4
 
       - uses: erlef/setup-beam@v1
         with: