change source for descriptastorus to get an older version

environment.yml

@@ -14,14 +14,16 @@
 # Changelog:
 # - May 15, 2023 Added this changelog, added inline documentation,
 #   made dependency list more explicit (@JacksonBurns).
-# - October 16, 2023 Switched RDKit and descripatastorus to conda-forge
+# - October 16, 2023 Switched RDKit to conda-forge and
+#   descripatastorus to katanagraph
 #
 name: rmg_env
 channels:
   - defaults
   - rmg
   - conda-forge
   - cantera
+  - katanagraph
 dependencies:
 # System-level dependencies - we could install these at the OS level
 # but by installing them in the conda environment we get better control
@@ -47,11 +49,11 @@ dependencies:
   - conda-forge::openbabel >= 3
   - conda-forge::rdkit >=2022.09.1
   # requirement of chemprop
-  # change this to >=2.6.1 upon moving to Python 3.11+, see
+  # change this to >=2.6.1 from conda-forge upon moving to Python 3.11+, see
   # https://github.com/chemprop/chemprop/issues/428 for why
   # TL;DR: scipy introduced incompatible API changes with 2.6.1+ of
   # descriptastorus
-  - conda-forge::descriptastorus <2.6.1  
+  - katanagraph::descriptastorus
 
 # general-purpose external software tools
   - conda-forge::julia>=1.8.5,!=1.9.0