CI: Reduce number of runs

Author: minad

.github/workflows/test.yml

@@ -6,7 +6,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        emacs-version: [29.1, 29.2, 29.3, 29.4, 30.1, 30.2, 31.1, snapshot] # release-snapshot
+        emacs-version: [29.1, 30.1, 31.1, snapshot] # release-snapshot
     steps:
       - uses: actions/checkout@v6
       - uses: purcell/setup-emacs@master