Update submodules: plugins (new commits)

plugins:
    1244fea Greg Holmes <greg@dmdirc.com>
            Fix validation of actions (and the validating text field itself).

            Fixes-Issue: CLIENT-438
            Fixes-Issue: CLIENT-437
            Gerrit: http://gerrit.dmdirc.com/3159

Change-Id: I5d121aaefd245956a97bd4ac12c8478ae0db110d