Update docs/content/users/quickstart.md

remove `--no-dev -o` option from composer install and adding the `ddev launch` i forgot in the first place for the git clone variant - changes based the review from @stasadev

Co-authored-by: Stanislav Zhuk <stasadev@gmail.com>

docs/content/users/quickstart.md

@@ -216,9 +216,10 @@ ddev launch
     git clone -b master https://github.com/getgrav/grav.git .
     ddev config --php-version=8.2 --omit-containers=db
     ddev start
-    ddev composer install --no-dev -o
+    ddev composer install
     ddev exec bin/grav install
     ddev exec bin/gpm install admin -y
+    ddev launch
     ```
 
 !!!tip "How to update?"