Bump actions/upload-artifact from 4 to 5

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 4 to 5.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](actions/upload-artifact@v4...v5)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/dendrite.yml

@@ -381,7 +381,7 @@ jobs:
         run: /src/are-we-synapse-yet.py /logs/results.tap -v
         continue-on-error: true # not fatal
       - name: Upload Sytest logs
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         if: ${{ always() }}
         with:
           name: Sytest Logs - ${{ job.status }} - (Dendrite, ${{ join(matrix.*, ', ') }})

.github/workflows/schedules.yaml

@@ -80,7 +80,7 @@ jobs:
         run: /src/are-we-synapse-yet.py /logs/results.tap -v
         continue-on-error: true # not fatal
       - name: Upload Sytest logs
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         if: ${{ always() }}
         with:
           name: Sytest Logs - ${{ job.status }} - (Dendrite ${{ join(matrix.*, ' ') }})
@@ -206,7 +206,7 @@ jobs:
         working-directory: complement
 
       - name: Upload Complement logs
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v5
         if: ${{ always() }}
         with:
           name: Complement Logs - (Dendrite ${{ join(matrix.*, ' ') }})