[search] fix for plainto_tsquery for docs search

This is because to_tsquery doesn't work with multiple words not
separated by AND or OR.
2 jobs for dev-ilike-search-fix in 37 minutes and 23 seconds (queued for 3 seconds)
latest
Status Job ID Name Coverage
  Test
failed #2207
docs

00:08:52

passed #2208
test

00:28:31

 
Name Stage Failure
failed
docs Test
    parseZonedTime (src/Gargantext/Core/Text/Corpus/Parsers/Date/Parsec.hs:81)
fromRFC3339 (src/Gargantext/Core/Text/Corpus/Parsers/Date/Parsec.hs:89)
Completed 401 action(s).

-- While building package gargantext-0.0.4.3 (scroll up to its section to see the error) using:
/builds/gargantext/haskell-gargantext/.stack-root/setup-exe-cache/x86_64-linux/Cabal-simple_mPHDZzAJ_3.2.1.0_ghc-8.10.7 --builddir=.stack-work/dist/x86_64-linux/Cabal-3.2.1.0 haddock --html --hoogle --html-location=../$pkg-$version/ --haddock-option=--hyperlinked-source --haddock-option=--quickjump
Process exited with code: ExitFailure 1
Cleaning up file based variables
ERROR: Job failed: exit code 1