fix(docs): only publish API docs on v6 tags

[erickzhao]

As discussed in today's Ecosystem WG meeting.

cc @VerteDinde @malept @dsanders11

[codecov]

Codecov Report

Merging #2976 (2d2bf00) into main (2c12d73) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #2976   +/-   ##
=======================================
  Coverage   73.78%   73.78%           
=======================================
  Files          66       66           
  Lines        2144     2144           
  Branches      423      423           
=======================================
  Hits         1582     1582           
+ Misses        359      357    -2     
- Partials      203      205    +2     

Impacted Files	Coverage Δ
packages/maker/deb/src/MakerDeb.ts	90.90% <0.00%> (ø)
packages/maker/rpm/src/MakerRpm.ts	90.90% <0.00%> (ø)

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