ci: build and test on pfSense CE 2.8.1

Author: jaredhendrickson13

.github/workflows/build.yml

@@ -57,6 +57,8 @@ jobs:
         include:
           - PFSENSE_VERSION: pfSense-2.8.0-RELEASE
             FREEBSD_ID: freebsd15
+          - PFSENSE_VERSION: pfSense-2.8.1-RELEASE
+            FREEBSD_ID: freebsd15
     steps:
       - uses: actions/checkout@v4
       - uses: actions/download-artifact@v4
@@ -105,6 +107,8 @@ jobs:
         include:
           - PFSENSE_VERSION: pfSense-2.8.0-RELEASE
             FREEBSD_ID: freebsd15
+          - PFSENSE_VERSION: pfSense-2.8.1-RELEASE
+            FREEBSD_ID: freebsd15
     steps:
       - uses: actions/checkout@v4
       - uses: actions/download-artifact@v4
@@ -132,6 +136,8 @@ jobs:
         include:
           - PFSENSE_VERSION: pfSense-2.8.0-RELEASE
             FREEBSD_ID: freebsd15
+          - PFSENSE_VERSION: pfSense-2.8.1-RELEASE
+            FREEBSD_ID: freebsd15
 
     steps:
       - uses: actions/checkout@v4