Add release checksums to release process

Author: MelbourneDeveloper

.github/workflows/release.yml

@@ -97,8 +97,14 @@ jobs:
           path: assets
           merge-multiple: true
 
+      - name: Generate SHA256 checksums
+        working-directory: assets
+        run: sha256sum * > ../checksums-sha256.txt
+
       - name: Create GitHub Release
         uses: softprops/action-gh-release@v2
         with:
           generate_release_notes: true
-          files: assets/*
+          files: |
+            assets/*
+            checksums-sha256.txt