Fix URL encoding of links

[ThomasThelen]

Not all of the URLS for the the ohi prep document (from the goal pages) are resolving to the anchors.

The first link is getting turned into the second link somewhere between my markdown document and the generated html. This causes issues when the anchor is encoded, which breaks it.

https://ohi-science.org/ohiprep_v2020/globalprep/methods_doc/v2020/Supplement.html#691_iconic_species_(subgoal_of_sense_of_place)

https://ohi-science.org/ohiprep_v2020/globalprep/methods_doc/v2020/Supplement.html#691_iconic_species_%28subgoal_of_sense_of_place%29