enable freebsd_amd64 inside CI

.github/workflows/ci.yml

@@ -41,6 +41,9 @@ jobs:
       - name: Odin check examples/all for Linux i386
         run: ./odin check examples/all -vet -strict-style -target:linux_i386
         timeout-minutes: 10
+      - name: Odin check examples/all for FreeBSD amd64
+        run: ./odin check examples/all -vet -strict-style -target:freebsd_amd64
+        timeout-minutes: 10
       - name: Odin check examples/all for OpenBSD amd64
         run: ./odin check examples/all -vet -strict-style -target:openbsd_amd64
         timeout-minutes: 10