Use conda-forge rdkit-postgresql in README; drop Apple-silicon caveats (#180)

rdkit-postgresql is available on Apple silicon via conda-forge (already
how CI installs it), so the special-case instructions are no longer
needed.

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: skearnes

README.md

@@ -31,8 +31,7 @@ Prerequisites:
 ```bash
 git clone https://github.com/open-reaction-database/ord-interface
 cd ord-interface
-# Apple silicon: use `conda install postgresql` instead of the rdkit channel.
-conda install -c rdkit rdkit-postgresql
+conda install -c conda-forge rdkit-postgresql
 uv sync
 ```
 

ord_interface/api/README.md

@@ -6,8 +6,7 @@ Set up your environment by installing postgres with the RDKit cartridge:
 
 ```shell
 conda install postgresql python=3.10
-# Note that rdkit-postgresql is currently only available on x86_64.
-conda install -c rdkit rdkit-postgresql
+conda install -c conda-forge rdkit-postgresql
 cd ord-interface
 pip install -e ".[tests]"
 ```