change conda channel for rdkit install

.github/workflows/documentation.yml

@@ -29,7 +29,7 @@ jobs:
       uses: s-weigand/setup-conda@v1
       with:
         activate-conda: true
-        conda-channels: rdkit 
+        conda-channels: conda-forge 
     - run: |
         conda install rdkit
         pip install -e .

.github/workflows/tests.yml

@@ -31,7 +31,7 @@ jobs:
       uses: s-weigand/setup-conda@v1
       with:
         activate-conda: true
-        conda-channels: rdkit 
+        conda-channels: conda-forge 
     - run: |
         conda install rdkit
         pip install -e .

README.md

@@ -20,7 +20,7 @@
   For linux/mac OS this is most easily done using the anaconda python with commands similar to:
 
   ```console
-  conda create -c rdkit -n rdkit-env rdkit python=3.7
+  conda create -c conda-forge -n rdkit-env rdkit python=3.7
   conda activate rdkit-env
   ```