build: build and release for pfSense Plus 26.03

Author: jaredhendrickson13

.github/workflows/release.yml

@@ -40,6 +40,8 @@ jobs:
             PFSENSE_VERSION: "25.11"
           - FREEBSD_VERSION: FreeBSD-16.0-CURRENT
             PFSENSE_VERSION: "25.11.1"
+          - FREEBSD_VERSION: FreeBSD-16.0-CURRENT
+            PFSENSE_VERSION: "26.03"
 
     steps:
       - uses: actions/checkout@v6