chore(deps): bump dawidd6/action-download-artifact from 6 to 7 (MODFLOW-ORG#2080)

Author: dependabot[bot]

.github/workflows/release_dispatch.yml

@@ -252,7 +252,7 @@ jobs:
           cache-environment: true
 
       - name: Download artifacts
-        uses: dawidd6/action-download-artifact@v6
+        uses: dawidd6/action-download-artifact@v7
 
       - name: Draft release
         working-directory: modflow6