update security check endpoint to security.symfony.com

Author: bobdenotter

.travis.yml

@@ -38,7 +38,7 @@ script:
   # this checks that the XLIFF translations contain no syntax errors
   - ./bin/console lint:xliff translations
   # this checks that the application doesn't use dependencies with known security vulnerabilities
-  - ./bin/console security:check --end-point=http://security.sensiolabs.org/check_lock
+  - ./bin/console security:check --end-point=http://security.symfony.com/check_lock
   # this checks that the composer.json and composer.lock files are valid
   - composer validate --strict
   # this checks that Doctrine's mapping configurations are valid