Bump actions/download-artifact from 2 to 4.1.7 in /.github/workflows (#85)

Bumps [actions/download-artifact](https://github.com/actions/download-artifact) from 2 to 4.1.7.
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v2...v4.1.7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Thomas Ploch <[email protected]>

Author: dependabot[bot]

.github/workflows/checks.yml

@@ -43,7 +43,7 @@ jobs:
     steps:
       -
         name: Download sources
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4.1.7
         with:
           name: source
       -
@@ -108,15 +108,15 @@ jobs:
     steps:
       -
         name: Download sources
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4.1.7
         with:
           name: source
       -
         name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
       -
         name: Download docker image
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4.1.7
         with:
           name: php-avro-serde-${{ matrix.php.version }}
       -
@@ -180,15 +180,15 @@ jobs:
     steps:
       -
         name: Download sources
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4.1.7
         with:
           name: source
       -
         name: Set up Docker Buildx
         uses: docker/setup-buildx-action@v1
       -
         name: Download docker image
-        uses: actions/download-artifact@v2
+        uses: actions/download-artifact@v4.1.7
         with:
           name: php-avro-serde-7.4
       -