docs: update PG 11 release notes based on feedback
Branch------master
Details-------https://git.postgresql.org/pg/commitdiff/3122e320913db0288d0b96a7eb65401962c4781b
Modified Files--------------doc/src/sgml/release-11.sgml | 44 ++++++++++++++++++++++++++++++++++++++++++--1 file changed, 42 insertions(+), 2 deletions(-)
