ci: fix mysql host for testing

Author: mubbi

.github/workflows/ci.yml

@@ -153,7 +153,7 @@ jobs:
         run: |
           echo "APP_ENV=testing" >> .env
           echo "DB_CONNECTION=mysql" >> .env
-          echo "DB_HOST=127.0.0.1" >> .env
+          echo "DB_HOST=mysql" >> .env
           echo "DB_PORT=3306" >> .env
           echo "DB_DATABASE=laravel_blog_test" >> .env
           echo "DB_USERNAME=laravel_user" >> .env
@@ -165,7 +165,7 @@ jobs:
       - name: Wait for MySQL to be ready
         run: |
           for i in {1..30}; do
-            if mysqladmin ping -h 127.0.0.1 -u laravel_user -plaravel_password --silent; then
+            if mysqladmin ping -h mysql -u laravel_user -plaravel_password --silent; then
               echo "MySQL is ready"
               break
             fi