fix(ci): upgrade nightly-dev release action to v2 for large asset uploads

softprops/action-gh-release@v1 fails with HTML error responses when
uploading large assets (~1.9GB). v2 has improved chunking and retry
logic. release.yml was already on v2.

Author: fewtarius

.github/workflows/nightly-dev.yml

@@ -143,7 +143,7 @@ jobs:
           fi
       
       - name: Create GitHub pre-release
-        uses: softprops/action-gh-release@v1
+        uses: softprops/action-gh-release@v2
         with:
           tag_name: ${{ env.DEV_VERSION }}
           name: SAM ${{ env.DEV_VERSION }} (Development)