bug template: add how to find wxPython version

.github/ISSUE_TEMPLATE/bug_report.md

@@ -27,13 +27,15 @@ If applicable, add screenshots to help explain your problem.
 **System description (please complete the following information):**
 
 - Operating System: [e.g. Windows, Linux, ..., incl. version]
-- GRASS GIS version [e.g. 7.8.1]
+- GRASS GIS version [e.g. 7.8.4]
 
 <!---
 
 - details about further software components
     - run `g.version -rge` in a GRASS GIS terminal session or check in
       the GUI menu "Help > About"
+    - run `python3 -c "import sys, wx; print(sys.version); print(wx.version())"`
+      to print the Python and wxPython version numbers
 --->
 
 **Additional context**