CI: Fix linux-debug artifact

Signed-off-by: falkTX <falktx@falktx.com>

.github/workflows/build.yml

@@ -153,7 +153,7 @@ jobs:
         with:
           name: ${{ github.event.repository.name }}-linux-x86_64-debug-${{ github.event.pull_request.number || env.SHA8 }}
           path: |
-            *.tar.gz
+            *.tar.xz
 
   macos:
     strategy: