Some links are Not found

[yuvarajsai]

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1. In App errors, the link specified at Error boundary Example code is Not found. Seems like the file it is pointing to might have been deleted.

2. In [Code splitting] (https://github.com/alan2207/bulletproof-react/blob/master/docs/performance.md#code-splitting), Code splitting example code link is not found. https://github.com/alan2207/bulletproof-react/blob/master/src/routes/index.tsx

On clicking on the link: