pgsql: doc PG 19 relnotes: add missing March 16 autovacuum score item

doc PG 19 relnotes: add missing March 16 autovacuum score item

Also fix "deformed" tuples.

Reported-by: David Rowley

Backpatch-through: CAApHDvrsyD3QKBO=dypNkyFzYOzQEbgy+xJLwn=y+h+bLSDd-g@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/23ec74c8a85245e379ef2eb515e3e6e7f2381655

Modified Files
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doc/src/sgml/release-19.sgml | 19 ++++++++++++++++++-
1 file changed, 18 insertions(+), 1 deletion(-)