remove mention of #docker-meeting

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au> (github: SvenDowideit)

CONTRIBUTING.md

@@ -163,7 +163,7 @@ If you have any questions, please refer to the FAQ in the [docs](http://docs.doc
 * Step 1: learn the component inside out
 * Step 2: make yourself useful by contributing code, bugfixes, support etc.
 * Step 3: volunteer on the irc channel (#docker@freenode)
-* Step 4: propose yourself at a scheduled #docker-meeting
+* Step 4: propose yourself at a scheduled docker meeting in #docker-dev
 
 Don't forget: being a maintainer is a time investment. Make sure you will have time to make yourself available.
 You don't have to be a maintainer to make a difference on the project!