Bump actions/upload-artifact from 5 to 6 (#231)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 5 to 6.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v5...v6)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/_build.yml

@@ -46,7 +46,7 @@ jobs:
 
       # Save ("upload") the distribution artifacts for use by downstream Actions jobs
       - name: Upload distribution artifacts
-        uses: actions/upload-artifact@v5 # This allows us to persist the dist directory after the job has completed
+        uses: actions/upload-artifact@v6 # This allows us to persist the dist directory after the job has completed
         with:
           name: python-package-distributions
           path: dist/
@@ -98,7 +98,7 @@ jobs:
 
       # This makes the artifacts available for downstream jobs
       - name: Upload Conda build artifact
-        uses: actions/upload-artifact@v5
+        uses: actions/upload-artifact@v6
         with:
           name: conda-package
           path: ${{ env.CONDA_BLD_PATH }}/**/space_packet_parser-*