Update cheatsheets

symfony

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# symfony
+
+> The console component for the Symfony framework.
+> More information: <https://symfony.com>.
+
+- Create a new Symfony project:
+
+`symfony new {{name}}`
+
+- Run a local web server:
+
+`symfony serve`
+
+- Stop the local web server:
+
+`symfony server:stop`
+
+- Check for security issues in the project's dependencies:
+
+`symfony security:check`