⬆️ Bump dawidd6/action-download-artifact from 15 to 18 (#712)

Bumps [dawidd6/action-download-artifact](https://github.com/dawidd6/action-download-artifact) from 15 to 18.
- [Release notes](https://github.com/dawidd6/action-download-artifact/releases)
- [Commits](dawidd6/action-download-artifact@v15...v18)

---
updated-dependencies:
- dependency-name: dawidd6/action-download-artifact
  dependency-version: '18'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Matt McKay <mmcky@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/ci.yml

@@ -40,7 +40,7 @@ jobs:
         shell: bash -l {0}
         run: pip list
       - name: Download "build" folder (cache)
-        uses: dawidd6/action-download-artifact@v15
+        uses: dawidd6/action-download-artifact@v18
         with:
           workflow: cache.yml
           branch: main

.github/workflows/collab.yml

@@ -20,7 +20,7 @@ jobs:
         shell: bash -l {0}
         run: pip list
       - name: Download "build" folder (cache)
-        uses: dawidd6/action-download-artifact@v15
+        uses: dawidd6/action-download-artifact@v18
         with:
           workflow: cache.yml
           branch: main

.github/workflows/publish.yml

@@ -41,7 +41,7 @@ jobs:
         shell: bash -l {0}
         run: pip list
       - name: Download "build" folder (cache)
-        uses: dawidd6/action-download-artifact@v15
+        uses: dawidd6/action-download-artifact@v18
         with:
           workflow: cache.yml
           branch: main