appveyor.yml - comment x86 Python 3.9 configuration because it is missing prebuilt Pandas dependencies

Author: astanin

appveyor.yml

@@ -8,7 +8,7 @@ environment:
     # The list here is complete (excluding Python 2.6, which
     # isn't covered by this document) at the time of writing.
 
-    - PYTHON: "C:\\Python39"
+    #- PYTHON: "C:\\Python39"
     - PYTHON: "C:\\Python310"
     - PYTHON: "C:\\Python311"
     - PYTHON: "C:\\Python312"