Docs update request: /stylus/stylus-gentle-introduction

[Flisflas69]

Source: https://docs.arbitrum.io/stylus/stylus-gentle-introduction

Request: (how can we help?)

Psst, this issue will be closed with a templated response if it isn't a documentation update request.

### Tasks
- [ ] https://github.com/OffchainLabs/arbitrum-docs/pull/1341
- [ ] https://github.com/OffchainLabs/arbitrum-docs/pull/1333
- [ ] https://github.com/OffchainLabs/arbitrum-docs/pull/1344
- [ ] https://github.com/OffchainLabs/arbitrum-docs/pull/1224

### Tasks

[Flisflas69]

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