Merge pull request #335 from ethancedwards8/gha-bump

gha: ubuntu-20.04 -> ubuntu-latest

Author: ethancedwards8

.github/workflows/check-syntax.yml

@@ -4,7 +4,7 @@ on: [push, pull_request]
 
 jobs:
   test:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     steps:
     - name: checkout
       uses: actions/checkout@master