fix: breaking docs CI

[john-bodley]

SUMMARY

The CI checks are failing in master for changes which relate to the documentation. This PR fixes the lint issues.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TEST PLAN

CI.

ADDITIONAL INFORMATION

• Has associated issue:
• Changes UI
• Requires DB Migration.
• Confirm DB Migration upgrade and downgrade tested.
• Introduces new feature or API
• Removes existing feature or API

[codecov-commenter]

Codecov Report

Merging #11156 into master will decrease coverage by 3.63%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #11156      +/-   ##
==========================================
- Coverage   65.84%   62.21%   -3.64%     
==========================================
  Files         827      436     -391     
  Lines       39051    14560   -24491     
  Branches     3673     3673              
==========================================
- Hits        25715     9059   -16656     
+ Misses      13229     5320    -7909     
- Partials      107      181      +74     

Flag	Coverage Δ
#cypress	?
#javascript	62.21% <ø> (ø)
#python	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
superset-frontend/src/SqlLab/App.jsx	0.00% <0.00%> (-100.00%)	⬇️
superset-frontend/src/explore/App.jsx	0.00% <0.00%> (-100.00%)	⬇️
superset-frontend/src/dashboard/App.jsx	0.00% <0.00%> (-100.00%)	⬇️
superset-frontend/src/explore/index.jsx	0.00% <0.00%> (-100.00%)	⬇️
superset-frontend/src/dashboard/index.jsx	0.00% <0.00%> (-100.00%)	⬇️
superset-frontend/src/setup/setupColors.js	0.00% <0.00%> (-100.00%)	⬇️
superset-frontend/src/chart/ChartContainer.jsx	0.00% <0.00%> (-100.00%)	⬇️
superset-frontend/src/setup/setupFormatters.js	0.00% <0.00%> (-100.00%)	⬇️
superset-frontend/src/explore/reducers/index.js	0.00% <0.00%> (-100.00%)	⬇️
superset-frontend/src/setup/setupPluginsExtra.js	0.00% <0.00%> (-100.00%)	⬇️
... and 554 more

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[john-bodley]

Actually there seems to be another issue related to gatsbyjs/gatsby#26941. @rusackas et al. would you be able to look into this?

[mistercrunch]

Yeah that one drove me crazy. gatsby-plugin-mdx doesn't like the ASF header/comment on docs/README.md, and RAT (ASF-license scanner/validator) doesn't want to ignore that file (looks like a bug where it doesn't want to .rat-exclude a README file). After going down the rabbit hole unsuccessfully I decided that the easy hack forward is to rename README.md to README.txt.

I'm having other issues with Fossa going MiA my PR that does that (amongst other things)
#11154

[mistercrunch]

I managed to merge my PR that addresses the issues mentioned here.