chore(deps): bump actions/upload-artifact from 5 to 6 (#48)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/qmk.yml

@@ -64,15 +64,15 @@ jobs:
           qmk info -m -l -kb hineybush/h60 -km haunt98
           qmk info -m -l -kb sofle/rev1 -km haunt98
       - name: Archive firmware
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: haunt98_firmware_${{ matrix.qmk_ref }}
           path: |
             *.hex
             *.bin
             *.uf2
       - name: Archive keymaps JSON
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: haunt98_keymaps_${{ matrix.qmk_ref }}
           path: |