minor symfony#12184 [FrameworkBundle] add changelog entry for web server commands (xabbuh)

This PR was merged into the 2.6-dev branch.

Discussion
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[FrameworkBundle] add changelog entry for web server commands

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets |
| License       | MIT
| Doc PR        |

I just noticed that I forgot to add a changelog entry in symfony#11311.

Commits
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292088f add changelog entry for web server commands

Author: fabpot

src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md

@@ -4,6 +4,8 @@ CHANGELOG
 2.6.0
 -----
 
+ * Added helper commands (`server:start`, `server:stop` and `server:status`) to control the built-in web
+   server in the background
  * Added `Controller::isCsrfTokenValid` helper
  * Added configuration for the PropertyAccess component
  * Added `Controller::redirectToRoute` helper