Update main.yml

Author: bradchiappetta

.github/workflows/main.yml

@@ -2,7 +2,7 @@ name: Build
 on: [push, pull_request]
 jobs:
   lint:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@master
     - uses: leafo/[email protected]
@@ -17,7 +17,7 @@ jobs:
         make lint
 
   build-and-test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     needs: lint
     steps:
       - uses: actions/checkout@master