Bump actions/download-artifact from 2 to 3

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 2 to 3.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v2...v3)

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

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/build.yml

@@ -51,7 +51,7 @@ jobs:
     if: startsWith(github.ref, 'refs/tags/') # Only release tagged commits
 
     steps:
-    - uses: actions/download-artifact@v2
+    - uses: actions/download-artifact@v3
       with:
         name: NHtmlUnit.nupkg
 
@@ -68,7 +68,7 @@ jobs:
     if: startsWith(github.ref, 'refs/tags/') # Only publish tagged commits
 
     steps:
-    - uses: actions/download-artifact@v2
+    - uses: actions/download-artifact@v3
       with:
         name: NHtmlUnit.nupkg