[CI] create zipped notebooks for link check

[szha]

Description

create zipped notebooks for link check

Checklist

Essentials

• PR's title starts with a category (e.g. [BUGFIX], [MODEL], [TUTORIAL], [FEATURE], [DOC], etc)
• Changes are complete (i.e. I finished coding on this PR)

Changes

• create zipped notebooks for link check

[codecov]

Codecov Report

❗ No coverage uploaded for pull request head (linkcheck_fix@2a491e4). Click here to learn what that means.
The diff coverage is n/a.

[codecov]

Codecov Report

Merging #712 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #712   +/-   ##
=======================================
  Coverage   90.53%   90.53%           
=======================================
  Files          65       65           
  Lines        5991     5991           
=======================================
  Hits         5424     5424           
  Misses        567      567

[mli]

Job PR-712/1 is complete.
Docs are uploaded to http://gluon-nlp-staging.s3-accelerate.dualstack.amazonaws.com/PR-712/1/index.html