Fixed directory to run ruff on

Author: c8y3

.github/workflows/ci.yml

@@ -9,16 +9,10 @@ jobs:
     steps:
       - name: Check out
         uses: actions/checkout@v4
-      - name: Check source with ruff
+      - name: Run ruff
         uses: astral-sh/ruff-action@v3
         with:
           args: check --output-format=github
-          src: ./source
-      - name: Check tests with ruff
-        uses: astral-sh/ruff-action@v3
-        with:
-          args: check --output-format=github
-          src: ./tests
 
   build:
     name: Build