pgsql: doc: Correct jsonpath string literal escapes description

doc: Correct jsonpath string literal escapes description

The paragraph describing the JavaScript string literals allowed in
jsonpath expressions unnecessarily mentions JSON by erroneously
listing \v as allowed by JSON and mentioning the \xNN and \u{N...}
backslash escapes as deviations from JSON when in fact both are
accepted by ECMAScript/JavaScript.  Fix this by only referring to
JavaScript.

Author: Erik Wienhold <ewie@ewie.name>
Discussion: https://www.postgresql.org/message-id/flat/1EB17DF9-2636-484B-9DD0-3CAB19C4F5C4@justatheory.com

Branch
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REL_12_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/a8457887c3c15123f644a40279d24fc2e26fe3cc

Modified Files
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doc/src/sgml/json.sgml | 15 +++++++--------
1 file changed, 7 insertions(+), 8 deletions(-)