Why travis is not creating the Stable part of the document?

hi, I am trying to create documents for my packge and I have added a document part in travis yml file. Its creating the dev part of the document but not sure why its not creating the stable part. If some one can have a look and suggest some change. Here is the yml file but there might be problem in the doc make file. Here is the last build.
Thanks,

Stable docs are built for tags. You do have a tag in the repo, but do not seem to run Travis on tags (alternatively the tag is old before you set up Travis.)

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