Update version in the README.md

Author: maks-rafalko

README.md

@@ -15,7 +15,7 @@ jobs:
   check:
     runs-on: ubuntu-latest
     steps:
-      - uses: infection/tests-checker-action@v1
+      - uses: infection/tests-checker-action@v1.0.1
         with:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 ```