Doc: update v13 release notes for changes through today.
Branch------REL_13_STABLE
Details-------https://git.postgresql.org/pg/commitdiff/bc635dd16388015c72e47a4b90c4c3ceecebb0cd
Modified Files--------------doc/src/sgml/release-13.sgml | 158 +++++++++++++++++++++++++++++++------------1 file changed, 115 insertions(+), 43 deletions(-)
