Update unit.fmf ref to v3.8.1

Resolves: RHEL-121567

Signed-off-by: Chung Chung <cchung@redhat.com>

plans/unit.fmf

@@ -13,7 +13,7 @@ prepare:
 discover:
   how: shell
   url: https://github.com/stratis-storage/testing.git
-  ref: v3.8.0
+  ref: v3.8.1
   tests:
     - name: unit
       test: python3 stratisd_cert.py -v

stratisd.spec

@@ -6,7 +6,7 @@
 
 Name:           stratisd
 Version:        3.8.1
-Release:        2%{?dist}
+Release:        3%{?dist}
 Summary:        Daemon that manages block devices to create filesystems
 
 License:        (MIT OR Apache-2.0) AND Unicode-DFS-2016 AND Apache-2.0 AND (Apache-2.0 OR BSL-1.0) AND (Apache-2.0 WITH LLVM-exception OR Apache-2.0 OR MIT) AND MIT AND MPL-2.0 AND (Unlicense OR MIT)
@@ -168,6 +168,10 @@ a2x -f manpage docs/stratis-dumpmetadata.txt
 %{_mandir}/man8/stratis-dumpmetadata.8*
 
 %changelog
+* Mon Oct 27 2025 Chung Chung <cchung@redhat.com> - 3.8.1-3
+- Update unit.fmf ref to v3.8.1
+- Resolves: RHEL-121567
+
 * Wed Oct 22 2025 Chung Chung <cchung@redhat.com> - 3.8.1-2
 - Fix problem with FTBFS
 - Resolves: RHEL-121567