Bump actions/download-artifact from v1 to v2.0.7 (#50)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from v1 to v2.0.7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v1...f144d3c)

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

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

.github/workflows/release.yaml

@@ -48,7 +48,7 @@ jobs:
           release_name: Version ${{ github.ref }}
 
       - name: Download release artifacts from ubuntu-18.04
-        uses: actions/download-artifact@v1
+        uses: actions/download-artifact@v2.0.7
         with:
           name: release-ubuntu-18.04
           path: release/ubuntu-18.04
@@ -81,7 +81,7 @@ jobs:
           asset_content_type: application/pgp-signature
 
       - name: Download release artifacts from macos-10.15
-        uses: actions/download-artifact@v1
+        uses: actions/download-artifact@v2.0.7
         with:
           name: release-macos-10.15
           path: release/macos-10.15
@@ -114,7 +114,7 @@ jobs:
           asset_content_type: application/pgp-signature
 
       - name: Download release artifacts from windows-2019
-        uses: actions/download-artifact@v1
+        uses: actions/download-artifact@v2.0.7
         with:
           name: release-windows-2019
           path: release/windows-2019