Enhancement

Label names in chatwoot only support alphabets, numbers, hyphen and underscore.
At the moment the available validation doesn't show the user any errors, which would leave the user confused.

So let's add a validation error describing this behaviour

Current behaviour

<img width="1273" alt="Screenshot 2020-10-02 at 4 29 03 PM" src="https://user-images.githubuserconten

https://docs.microsoft.com/zh-cn/aspnet/core/fundamentals/http-requests?view=aspnetcore-3.1

In urlscan.io Submit URLs to be scanned, search for historical results by IP, domain or URL, retrieve results and pivot to further leads. You can search all Public scans as well as your own Private scans on our platform. You can subscribe to our API plans as a Team and share your available quota amongst multiple users on the urlscan.io platform.

Use the search for historical results featur

With firstcontributions/first-contributions#32256, We've moved assets we need in our tutorials to https://github.com/firstcontributions/assets. Now we should use them.

🎯 Goal
Replace usage of assets in this repository to assets repository to reduce the size of this repo.

💡 Possible solutions
You can find all the usages of assets by searching for assets
ht

more details at: allenai/allennlp#2264 (comment)