DOC: move pyqt pin warning above usual install cmd, so people are les…

…s likely to miss it. Also remove python 3.8 since 3.7-3.10 should work.

docs/source/installation.rst

@@ -14,20 +14,20 @@ Please note, this guide is written with Unix in mind, so there are probably some
 Installing PyDM and Prerequisites with Anaconda
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
-After installing Anaconda (see https://www.anaconda.com/download/), create a new
-environment for PyDM::
-  
-  $ conda create -n pydm-environment python=3.8 pyqt=5 pip numpy scipy six psutil pyqtgraph pydm -c conda-forge
-  $ source activate pydm-environment
-
 .. warning::
     There is currently no PyQt 5.15+ build available on conda or PyPI that has
     designer support for python plugins. PyDM widgets will not load in these designer versions.
 
     In order to use PyDM widgets in designer, please make sure to pin the PyQt version to 5.12.3 or lower
     until this is resolved.
 
-    $ conda create -n pydm-environment python=3.8 pyqt=5.12.3 pip numpy scipy six psutil pyqtgraph pydm -c conda-forge
+    $ conda create -n pydm-environment python=3.10 pyqt=5.12.3 pip numpy scipy six psutil pyqtgraph pydm -c conda-forge
+
+After installing Anaconda (see https://www.anaconda.com/download/), create a new
+environment for PyDM::
+  
+  $ conda create -n pydm-environment python=3.10 pyqt=5 pip numpy scipy six psutil pyqtgraph pydm -c conda-forge
+  $ source activate pydm-environment
 
 Once you've installed and activated the environment, you should be able to run 'pydm' to launch PyDM, or run 'designer' to launch Qt Designer.  If you are on Windows, run these commands from the Anaconda Prompt.