Enable rule @typescript-eslint/restrict-template-expressions and fix the only error

[kox]

This PR intends to fix a small part of issue solana-labs/web3.js-issue-conveyer#4

Specifically, it changes the rule @typescript-eslint/restrict-template-expressions, which is currently set to off, to error.

[steveluscher]

Very nice find. getErrorMessage returns a ReactNode ergo isn't safe to interpolate into a string.

[changeset-bot]

⚠️ No Changeset found

Latest commit: ad0671a

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[kox]

Very nice find. getErrorMessage returns a ReactNode ergo isn't safe to interpolate into a string.

Thanks for merging, that was fast!