Fix whitespace

Author: jimporter

.github/workflows/build.yml

@@ -24,9 +24,9 @@ jobs:
       matrix:
         include:
           # GCC builds
-          - {os: ubuntu-20.04, compiler: gcc, version:   '7',
+          - {os: ubuntu-20.04,  compiler: gcc, version:  '7',
              flags: '-Wsuggest-override'}
-          - {os: ubuntu-20.04, compiler: gcc, version:   '8',
+          - {os: ubuntu-20.04,  compiler: gcc, version:  '8',
              flags: '-Wsuggest-override'}
           - {os: ubuntu-latest, compiler: gcc, version:  '9',
              flags: '-Wsuggest-override'}