docs: fix redirect from bad find/replace

[mistercrunch]

#12289 did a find/replace across the board to remove all reference to the incubator/incubation/incubating and sent the Apache server's .htaccess file into a infinite redirect loop. This fixes that.

Tested in production here apache/superset-site@b22c82d

[request-info]

We would appreciate it if you could provide us with more info about this issue/pr! Please do not leave the title or description empty.

[codecov-io]

Codecov Report

Merging #12642 (9296e76) into master (e7def7e) will decrease coverage by 0.30%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #12642      +/-   ##
==========================================
- Coverage   66.80%   66.49%   -0.31%     
==========================================
  Files        1017     1017              
  Lines       49730    49730              
  Branches     4864     4864              
==========================================
- Hits        33221    33067     -154     
- Misses      16386    16540     +154     
  Partials      123      123              

Flag	Coverage Δ
cypress	50.97% <ø> (ø)
javascript	60.79% <ø> (ø)
python	63.47% <ø> (-0.52%)	⬇️

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

Impacted Files	Coverage Δ
superset/db_engines/hive.py	0.00% <0.00%> (-85.72%)	⬇️
superset/db_engine_specs/hive.py	54.61% <0.00%> (-29.24%)	⬇️
superset/db_engine_specs/presto.py	70.56% <0.00%> (-10.83%)	⬇️
superset/views/database/mixins.py	80.70% <0.00%> (-1.76%)	⬇️
superset/models/core.py	88.04% <0.00%> (-0.82%)	⬇️

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update e7def7e...9296e76. Read the comment docs.

[robdiciuccio]

Nice find!