Mention SQLite in docs

[ptrfarkas]

No description provided.

[codecov]

Codecov Report

Merging #3408 (91dfbbe) into main (0496e21) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##             main    #3408   +/-   ##
=======================================
  Coverage   74.25%   74.25%           
=======================================
  Files         414      414           
  Lines       25356    25356           
=======================================
  Hits        18828    18828           
  Misses       5442     5442           
  Partials     1086     1086           

Flag	Coverage Δ
hana-1	?
hana-2	?
hana-3	?
integration	71.20% <ø> (ø)
mongodb-1	4.76% <ø> (ø)
pg-1	43.85% <ø> (ø)
pg-2	43.58% <ø> (ø)
pg-3	44.09% <ø> (-0.04%)	⬇️
pushdown-false	56.38% <ø> (ø)
pushdown-true	71.20% <ø> (ø)
sqlite-1	42.76% <ø> (ø)
sqlite-2	42.21% <ø> (ø)
sqlite-3	43.17% <ø> (+<0.01%)	⬆️
unit	23.41% <ø> (ø)

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