pgsql: doc: PG 13 relnotes: fix link for grouping sets hash overflow

doc: PG 13 relnotes: fix link for grouping sets hash overflow

Use "guc-enable-groupingsets-hash-disk".

Reported-by: TAKATSUKA Haruka

Discussion: /messages/by-id/16468-7939d39f1786516c@postgresql.org

Backpatch-through: master

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/4d685f6d7b65fa1ca5afb5138e610cd08a3c1e12

Modified Files
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doc/src/sgml/release-13.sgml | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)