Update near-shell requirement in /blank_rust_react_project

Updates the requirements on [near-shell](https://github.com/nearprotocol/near-shell) to permit the latest version.
- [Release notes](https://github.com/nearprotocol/near-shell/releases)
- [Commits](near/near-cli@v0.20.2...v0.20.6)

Signed-off-by: dependabot-preview[bot] <support@dependabot.com>

blank_rust_react_project/package.json

@@ -22,7 +22,7 @@
     "gulp": "^4.0.2",
     "jest": "^25.1.0",
     "jest-environment-node": "^25.1.0",
-    "near-shell": "^0.20.2",
+    "near-shell": "^0.20.6",
     "nodemon": "^2.0.2",
     "parcel-bundler": "^1.12.4",
     "react-test-renderer": "^16.13.0",