Add seealso note to install docs (#6448)

* Add seealso note to install docs

* remove trailing whitespace

* Update docs/source/installation.md

Co-authored-by: Michael Osthege <[email protected]>

Co-authored-by: Michael Osthege <[email protected]>

Author: OriolAbril

docs/source/installation.md

@@ -11,6 +11,10 @@ conda activate pymc_env
 ```
 If you like, replace the name `pymc_env` with whatever environment name you prefer.
 
+:::{seealso}
+The [conda-forge tips & tricks](https://conda-forge.org/docs/user/tipsandtricks.html#using-multiple-channels) page to avoid installation
+issues when using multiple conda channels (e.g. defaults and conda-forge).
+:::
 
 ## JAX sampling