Update black.yml

The black workflow we use doesn't actually check test, so we remove it from our workflow

More specifically, it only lints one top level directory; it could lint test, but that would require running the workflow twice

At that point, might as well have a seperate workflow for blacking tests, but that's not as important

Author: ModernMAK

.github/workflows/black.yml

@@ -7,13 +7,11 @@ on:
     branches: [ main ]
     paths:
       - 'src/relic/**'
-      - 'tests/relic/**'
       - '.github/workflows/black.yml'
   pull_request:
     branches: [ main ]
     paths:
       - 'src/relic/**'
-      - 'tests/relic/**'
       - '.github/workflows/black.yml'
 
 jobs: