Fix workflow mutation. (#257)

Author: terabytesoftw

.github/workflows/mutation.yml

@@ -41,7 +41,6 @@ jobs:
 
         php:
           - 8.1
-          - 8.2
 
     services:
       oci:
@@ -88,6 +87,6 @@ jobs:
 
       - name: Run infection.
         run: |
-          vendor/bin/roave-infection-static-analysis-plugin -j2 --ignore-msi-with-no-mutations --only-covered
+          vendor/bin/roave-infection-static-analysis-plugin --threads=2 --ignore-msi-with-no-mutations --only-covered
         env:
           STRYKER_DASHBOARD_API_KEY: ${{ secrets.STRYKER_DASHBOARD_API_KEY }}