Update FreeBSD version to 14.1 in cross compiling workflow (#536)

* Update FreeBSD version to 14.1 in cross compiling workflow

The latest production release of FreeBSD is 14.1

* Cross build against FreeBSD 13.4 and 14.1

Test using all of the currently supported FreeBSD versions: 13.4 and 14.1.

.github/workflows/cross.yml

@@ -248,14 +248,18 @@ jobs:
     if: github.repository_owner == 'aws'
     name: aws-lc-rs freebsd test
     runs-on: ubuntu-latest
+    strategy:
+      fail-fast: false
+      matrix:
+        version: [13.4, 14.1]
     steps:
       - uses: actions/checkout@v4
         with:
           submodules: 'recursive'
       - name: Prepare VM
         uses: vmactions/freebsd-vm@v1
         with:
-          release: 13.2
+          release: ${{ matrix.target }}
           usesh: true
           copyback: false
           prepare: |