Use Emacs 29.3 instead of 29.1 for CI on Windows, in hope that weird charset(?)-related problems would be gone.

Author: doublep

.github/workflows/test.yml

@@ -26,9 +26,9 @@ jobs:
           # more likely) Emacs has some problems communicating with
           # processes on that OS, resulting in delays.
           # - os: macos-latest
-          #   emacs_version: '29.1'
+          #   emacs_version: '29.3'
           - os: windows-latest
-            emacs_version: '29.1'
+            emacs_version: '29.3'
 
     steps:
     - name: Set up Emacs