[PostGIS] #5716: address_standardizer licensing should be in the License.txt summary

[PostGIS]

#5716: address_standardizer licensing should be in the License.txt summary
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 Reporter:  robe                 |      Owner:  robe
     Type:  defect               |     Status:  new
 Priority:  medium               |  Milestone:  PostGIS 3.4.3
Component:  pagc_address_parser  |    Version:  3.4.x
 Keywords:                       |
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Ticket URL: <https://trac.osgeo.org/postgis/ticket/5716>
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