Test against 3.4.0-alpha1

Author: sfackler

.github/workflows/ci.yml

@@ -153,6 +153,8 @@ jobs:
               version: e23fe9b6eecc10e4f9ea1f0027fea5eaee7bd6b6
             - name: openssl
               version: vendored
+            - name: openssl
+              version: 3.4.0-alpha1
             - name: openssl
               version: 3.3.0
             - name: openssl