software/wordpress: lapp-resilient3 branch is gone

@rafael says:

    development stuff from marco, it was probably removed or not even
    included.

    In theory you can use master instead.

    nexedi/slapos@692729bc (comment 4713)

So lapp-resilient3 -> master

software/wordpress/development.cfg

@@ -33,7 +33,7 @@ git-executable = ${git:location}/bin/git
 [slapos.cookbook-repository]
 recipe = slapos.recipe.build:gitclone
 repository = https://lab.nexedi.com/nexedi/slapos.git
-branch = lapp-resilient3
+branch = master
 git-executable = ${git:location}/bin/git
 
 [slapos.core-repository]