Duplicate link to ST_Union aggregate function from documentation page

[lukaseder]

This page here: ​https://postgis.net/docs/PostGIS_Special_Functions_Index.html#PostGIS_Aggregate_Functions

Lists the following entry twice:

ST_Union - Returns a geometry representing the point-set union of the input geometries.

[robe]

That page is an autogenerated page. I think it's picking it up twice because the ST_Union function has two aggregate signatures:

geometry ST_Union(geometry set g1field);

geometry ST_Union(geometry set g1field, float8 gridSize)

Once I remember how to write XSL path statements I'll fix this to list once for each refentry

[Regina Obe <lr@…>]

In 8985b60d/git:

Prevent duplicate links in Aggregate section. References #5021 for PostGIS 3.2

[Regina Obe <lr@…>]

In bbc8230/git:

Prevent duplicate links in Aggregate section. Closes #5021 for PostGIS 3.1