pgsql: Fix output of tsquery example in docs.

Fix output of tsquery example in docs.

The output for this query changed in commit 4e2477b7b8. Backport to 9.6
like that commit.

Patch by Justin Pryzby, per Yaroslav Schekin's report.

Discussion: https://www.postgresql.org/message-id/20201005191922.GE17626%40telsasoft.com

Branch
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REL_10_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/609fe21c0dbd50cd5e3d13a73ea2f757fdfc75ff

Modified Files
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doc/src/sgml/textsearch.sgml | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)