build(deps): bump actions/upload-artifact from 6 to 7

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 6 to 7.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v6...v7)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/python-wheels.yml

@@ -27,7 +27,7 @@ jobs:
         with:
           package-dir: python
 
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         with:
           name: opendht-wheels-${{ matrix.os }}
           path: ./wheelhouse/*.whl
@@ -86,7 +86,7 @@ jobs:
           pipx run cibuildwheel python
         shell: pwsh
 
-      - uses: actions/upload-artifact@v6
+      - uses: actions/upload-artifact@v7
         with:
           name: opendht-wheels-win_amd64
           path: ./build/wheelhouse/*.whl

.github/workflows/release-package.yml

@@ -403,7 +403,7 @@ jobs:
           }
 
       - name: Upload MSI Artifact
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: opendht-windows-msi
           path: build/${{ steps.cpack_msi.outputs.msi_path }} # Path to the MSI in the build directory
@@ -483,7 +483,7 @@ jobs:
           cmake --build build_static --config Release --parallel $([System.Environment]::ProcessorCount)
 
       - name: Upload Static dhtnode Artifact
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: opendht-windows-dhtnode
           path: |

.github/workflows/windows-build.yml

@@ -181,7 +181,7 @@ jobs:
 
       - name: Upload build artifacts
         if: matrix.build_type == 'Release'
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: opendht-windows-${{ matrix.arch }}-cxx${{ matrix.cxx_standard }}-${{ matrix.build_type }}
           path: |
@@ -256,7 +256,7 @@ jobs:
           ctest --build-config ${{ matrix.build_type }} --output-on-failure --parallel 4
 
       - name: Upload static build artifacts
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: opendht-windows-static-${{ matrix.arch }}-cxx${{ matrix.cxx_standard }}-${{ matrix.build_type }}
           path: |
@@ -375,7 +375,7 @@ jobs:
 
       - name: Upload MinGW artifacts
         if: matrix.build_type == 'Release'
-        uses: actions/upload-artifact@v6
+        uses: actions/upload-artifact@v7
         with:
           name: opendht-windows-mingw-${{ matrix.build_type }}
           path: |