Use Psalm's native GitHub formatter

Author: takaram

.github/workflows/ci.yml

@@ -74,7 +74,7 @@ jobs:
  uses: shivammathur/setup-php@v2
  with:
  php-version: 8.0
- tools: composer:v2, cs2pr
+ tools: composer:v2
  coverage: none
  - name: Cache Composer dependencies
  uses: actions/cache@v4
@@ -85,4 +85,4 @@ jobs:
  - name: Install PHP dependencies
  run: composer install --no-interaction --no-progress --no-suggest
  - name: Psalm
- run: vendor/bin/psalm --output-format=checkstyle | cs2pr
+ run: vendor/bin/psalm --output-format=github