BUILD/MINOR: ci: update HAProxy e2e version

Author: oktalz

.github/workflows/e2e.yml

@@ -8,7 +8,7 @@ jobs:
     name: HAProxy
     strategy:
       matrix:
-        haproxy_version: ["2.1", "2.2", "2.3", "2.4", "2.5", "2.6", "2.7", "2.8", "2.9"]
+        haproxy_version: ["3.0"]
     runs-on: ubuntu-latest
     steps:
       - name: Check out code into the Go module directory