ci: fix artifact naming conflict using matrix.target

Author: linuxmobile

.github/workflows/ci.yml

@@ -43,7 +43,7 @@ jobs:
       - uses: actions/upload-artifact@v4
         if: github.event_name == 'push' && github.ref == format('refs/heads/{0}', github.event.repository.default_branch)
         with:
-          name: oxicord_${{ runner.os }}_${{ runner.arch }}
+          name: oxicord_${{ matrix.target }}
           path: |
             target/${{ matrix.target }}/release/oxicord
             target/${{ matrix.target }}/release/oxicord.exe