docs: fix db drivers PG and ES

[dpgaspar]

SUMMARY

Couple of small fixes on the docs. Fixes #11409

ADDITIONAL INFORMATION

• Has associated issue: Documentation : Postgres connection #11409
• Changes UI
• Requires DB Migration.
• Confirm DB Migration upgrade and downgrade tested.
• Introduces new feature or API
• Removes existing feature or API

[codecov-io]

Codecov Report

Merging #11504 into master will decrease coverage by 4.32%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #11504      +/-   ##
==========================================
- Coverage   66.55%   62.23%   -4.33%     
==========================================
  Files         869      869              
  Lines       41587    41582       -5     
  Branches     3797     3797              
==========================================
- Hits        27680    25878    -1802     
- Misses      13805    15525    +1720     
- Partials      102      179      +77     

Flag	Coverage Δ
#cypress	?
#javascript	62.57% <ø> (ø)
#python	62.03% <ø> (ø)

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 176 more

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