PCD269: bump pinned package version/reference for wp-proud-search-elastic

The repositories[].package block at composer.json:221 also hardcodes
the version and source.reference for this plugin. Previous commit
5ac25ec only updated the top-level require constraint, so the build
failed with "found 2026.05.04.1644 but it does not match" because
composer's package metadata still pointed at the old tag.

Bumps both fields to 2026.06.01.1513 to match the require line and
the GitHub tag.

Refs PCD269.

Author: curtismchale

composer.json

@@ -223,11 +223,11 @@
             "package": {
                 "name": "proudcity/wp-proud-search-elastic",
                 "type": "wordpress-plugin",
-                "version": "2026.05.04.1644",
+                "version": "2026.06.01.1513",
                 "source": {
                     "type": "git",
                     "url": "https://github.com/proudcity/wp-proud-search-elastic.git",
-                    "reference": "2026.05.04.1644"
+                    "reference": "2026.06.01.1513"
                 }
             }
         },