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] <support@github.com>

.github/workflows/generate-docs-for-dbt-core.yml

@@ -67,7 +67,7 @@ jobs:
 
       - name: upload changelog artifacts
         id: retrieve_changelogs
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: ${{ needs.set_variables.outputs.changie_artifact_name }}
           path: |
@@ -123,7 +123,7 @@ jobs:
         run: npx webpack
 
       - name: upload index.html artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: ${{ needs.set_variables.outputs.index_artifact_name }}
           path: dist/index.html

.github/workflows/generate-index.yml

@@ -77,7 +77,7 @@ jobs:
         run: npx webpack
 
       - name: upload index.html artifact
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         with:
           name: ${{ needs.set_variables.outputs.index_artifact_name }}
           path: |