Bump actions/download-artifact from 2 to 3 (haskell#2821)

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] <[email protected]>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/bench.yml

@@ -116,13 +116,13 @@ jobs:
         enable-stack: false
 
     - name: Download cabal home
-      uses: actions/download-artifact@v2
+      uses: actions/download-artifact@v3
       with:
         name: cabal-home
         path: .
 
     - name: Download workspace
-      uses: actions/download-artifact@v2
+      uses: actions/download-artifact@v3
       with:
         name: workspace
         path: .

.github/workflows/build.yml

@@ -148,7 +148,7 @@ jobs:
     needs: [tar, src-tar]
     runs-on: ubuntu-18.04
     steps:
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v3
 
       - name: Generate sha256 sums for all workflow artifacts
         run: |

.github/workflows/hackage.yml

@@ -150,7 +150,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
 
-      - uses: actions/download-artifact@v2
+      - uses: actions/download-artifact@v3
         with:
           path: packages