Force-override debian package version

Force-override debian package version to allow package-release updates.

.github/workflows/debian.yml

@@ -7,6 +7,8 @@ name: Debian
 
 env:
   GPG_KEY_ID: 56C464BAAC421453
+  KERNEL_VERSION: 5.4.13
+  KDEB_PKGVERSION: 5.4.13-2
 
 jobs:
   build:
@@ -25,8 +27,6 @@ jobs:
         apt-get -y build-dep linux
 
     - name: Prepare kernel source
-      env:
-        KERNEL_VERSION: 5.4.13
       run: |
         cd pkg/debian