Merge pull request plone#1242 from plone/fredvd_m1_build

Document work around for building documentation on M1 macs

Author: stevepiercy

docs/contributing/setup-build.md

@@ -40,6 +40,11 @@ cd documentation
 make html
 ```
 
+```{note}
+If you are using an M1 Mac to build the documentation, there is currently [an issue with pyenchant](https://github.com/pyenchant/pyenchant/issues/265) that throws an error that the enchant library can't be found.
+This happens for example if you install Python 3 with `pyenv` in the default M1 architecture (aarch64), so without following instructions to use Rosetta2 x86 emulation.
+A workaround until pyenchant is fixed is to run `export PYENCHANT_LIBRARY_PATH=/opt/homebrew/lib/libenchant-2.dylib` in the terminal session before you execute `make html`.
+```
 
 (setup-build-available-documentation-builds-label)=