Use ubuntu-22.04 in CI

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ on:
     
 jobs:
   build-binary:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v2
     - name: build binary
@@ -20,7 +20,7 @@ jobs:
        path: "*.rpx"
   deploy-binary:
     needs: build-binary
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     steps:   
     - name: Get environment variables
       id: get_repository_name

.github/workflows/pr.yml

@@ -4,7 +4,7 @@ on: [pull_request]
 
 jobs:
   build-binary:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     steps:
     - uses: actions/checkout@v2
     - name: build binary