Bump actions/upload-artifact from 3 to 4

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 3 to 4.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v3...v4)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/_build-packages.yml

@@ -28,7 +28,7 @@ jobs:
       - name: Keep artifact
         id: keep-artifact
         run: python -c "print('DAYS=' + str(5 if '${{ github.event_name }}'.startswith('pull_request') else 0))" >> $GITHUB_OUTPUT
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: ${{ inputs.artifact-name }}
           path: dist
@@ -62,7 +62,7 @@ jobs:
           mkdir pypi/${{ matrix.pkg-name }}
           cp dist/* pypi/${{ matrix.pkg-name }}/
 
-      - uses: actions/upload-artifact@v3
+      - uses: actions/upload-artifact@v4
         with:
           name: ${{ inputs.artifact-name }}
           path: pypi

.github/workflows/_flagship-apps.yml

@@ -102,7 +102,7 @@ jobs:
             --capture=no -v --color=yes
 
       - name: Upload recordings
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: failure()
         with:
           name: flahship-app-${{ matrix.app }}

.github/workflows/_legacy-checkpoints.yml

@@ -104,7 +104,7 @@ jobs:
           python -c "print('AWS_RUN=' + str('' if '${{inputs.push_to_s3}}' == 'true' else '--dryrun'))" >> $GITHUB_ENV
 
       - name: Upload checkpoints to GitHub Actions artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: checkpoints-${{ github.sha }}
           path: ${{ env.legacy_dir }}/checkpoints/

.github/workflows/docs-build.yml

@@ -116,7 +116,7 @@ jobs:
         run: echo "ARTIFACT_DAYS=7" >> $GITHUB_ENV
       - name: Upload built docs
         if: ${{ matrix.target == 'html' }}
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: docs-${{ matrix.pkg-name }}-${{ github.sha }}
           path: docs/build/html/