DOC: improved "action running" text
DOC: improved "action running" text

Noticed this while testing the previous commit. Since this step
is actually running the action, this message makes more sense
(especially for long running jobs).

jakereps/qiime-studio,qiime2/qiime-studio,qiime2/qiime-studio-frontend,qiime2/qiime-studio-frontend,jakereps/qiime-studio,jakereps/qiime-studio,jakereps/qiime-studio-frontend,qiime2/qiime-studio,jakereps/qiime-studio-frontend,qiime2/qiime-studio