docs: path change using download

db/docs/source/introduction.rst

@@ -63,7 +63,7 @@ Building outlines data are defined by the following criteria:
 
 The publicly available building outlines data consists of three tables. The `NZ Building Outlines <https://nz-buildings.readthedocs.io/en/latest/published_data.html#table-nz-building-outlines>`_ table contains all of the building outlines which match the most recent imagery available for each region of the country. The `NZ Building Outlines All Sources <https://nz-buildings.readthedocs.io/en/latest/published_data.html#table-nz-building-outlines-all-sources>`_ table contains all building outlines that have been delineated from every imagery year/set that has been captured, whether this is historical imagery or the most recent imagery. The `NZ Building Outlines Lifecycle <https://nz-buildings.readthedocs.io/en/latest/published_data.html#table-nz-building-outlines-lifecycle>`_ table provides building_id relationship information buildings that are split or merged.
 
-The details and criteria used to capture building outlines is listed in the  :doc:`Specification for Building Outlines version 2 </_static/Specification_for_Building_Outlines_V2.0_March_2023.pdf>`. Some of the current outlines in the data were captured according to an earlier Specification for Building Outlines version 1, however all new updates to the dataset follow the more current version 2 of this document.
+The details and criteria used to capture building outlines is listed in the  :download:`Specification for Building Outlines version 2 <../Specification_for_Building_Outlines_V2.0_March_2023.pdf>`. Some of the current outlines in the data were captured according to an earlier Specification for Building Outlines version 1, however all new updates to the dataset follow the more current version 2 of this document.
 
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