Replace `Element` with SchildiChat of `devText` on `MatrixChat.tsx`

[luixxiul]

Description:

Update devText on MatrixChat.tsx to replace Element with SchildiChat, as we're not Element but SchildiChat.

• Our code: https://github.com/SchildiChat/matrix-react-sdk/blob/5a1c34750acf0c8da2a8ba25b6f79e9ac115230e/src/components/structures/MatrixChat.tsx#L471-L475
• Upstream: https://github.com/matrix-org/matrix-react-sdk/blob/a7f8e82d165f3da128cb754639612a60527dcb71/src/components/structures/MatrixChat.tsx#L516
• Upstream: https://github.com/matrix-org/matrix-react-sdk/blob/a7f8e82d165f3da128cb754639612a60527dcb71/src/i18n/strings/en_EN.json#L626

Describe alternatives you've considered:

Additional context: