docs: Fix example snippets to use with Github Actions (#29)

Author: leosuncin

README.md

@@ -100,7 +100,7 @@ If you run your tests on [GitHub Actions](https://glebbahmutov.com/blog/trying-g
 
 ```yaml
 - name: Set code coverage commit status 📫
-  run: npx set-gh-status
+  run: npx -p check-code-coverage set-gh-status
   env:
     GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 ```
@@ -115,7 +115,7 @@ If there is a coverage badge in the README file, you can add 2nd status check. T
 
 ```yaml
 - name: Ensure coverage has not dropped 📈
-  run: npx set-gh-status --check-against-readme
+  run: npx -p check-code-coverage set-gh-status --check-against-readme
   env:
     GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
 ```
@@ -128,7 +128,7 @@ When setting a status on a GitHub pull request, you need to use SHA of the merge
 
 ```yaml
 - name: Ensure coverage has not dropped 📈
-  run: npx set-gh-status --check-against-readme
+  run: npx -p check-code-coverage set-gh-status --check-against-readme
   env:
     GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     GH_SHA: ${{ github.event.after }}