Nicer PR message

Author: ondrejmirtes

.github/workflows/send-pr.yml

@@ -28,6 +28,11 @@ jobs:
         working-directory: ./phpstan-src
         run: "composer install --no-interaction --no-progress --no-suggest"
 
+      - name: "Get old version"
+        working-directory: ./phpstan-src
+        id: old-version
+        run: echo "version=$(composer info phpstan/php-8-stubs --format json | jq --raw-output '.versions[0]')" >> $GITHUB_OUTPUT
+
       - name: "Change composer.json"
         working-directory: ./phpstan-src
         run: "composer require phpstan/php-8-stubs:${{ github.ref_name }}"
@@ -40,7 +45,7 @@ jobs:
           path: ./phpstan-src
           branch-suffix: random
           delete-branch: true
-          title: "Update PHP 8 stubs"
-          body: "Update PHP 8 stubs to ${{ github.ref_name }}"
+          title: "Update PHP 8 stubs to ${{ github.ref_name }}"
+          body: "Update PHP 8 stubs to ${{ github.ref_name }}: https://github.com/phpstan/php-8-stubs/compare/${{ steps.old-version.outputs.version }}...${{ github.ref_name }}"
           committer: "phpstan-bot <ondrej+phpstanbot@mirtes.cz>"
           commit-message: "Update PHP 8 stubs"