bumped ci ubuntu

.github/workflows/build.yml

@@ -129,7 +129,7 @@ jobs:
         path: artifact-zip
 
   Linux-Build:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     needs: Lint
 
     steps:

.github/workflows/docs.yml

@@ -2,7 +2,7 @@ name: Docs
 on: push
 jobs:
   build:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-latest
     if: ${{ github.actor != 'dependabot[bot]' }}
 
     steps: