change spelling for distro name

.github/workflows/run-tests.yml

@@ -13,7 +13,7 @@ jobs:
 
     steps:
       - uses: actions/checkout@v2
-      - name: run check and tests in archlinux container
+      - name: run check and tests in arch linux container
         run: |
           docker run \
           -v  ${{ github.workspace }}:/build -w /build \