docs: Update managing-dependencies.mdx (#10474)
### Description
Hey,
In the "Best practices for dependency installation" section, the example
command should be updated to align with the "Getting started" tutorial,
where the default setup installs the docs/ and web/ apps.
Right now, it references @repo/web, but that package doesn't exist, what
we actually have is @repo/ui.
The correct command should be:
```
pnpm install jest --save-dev --recursive --filter=web --filter=@repo/ui --filter=docs
```
<img width="830" alt="Screenshot 2025-05-12 at 10 17 52"
src="https://github.com/user-attachments/assets/4a81baf3-cb72-4511-9ba0-a189f92aa671"
/>
Instead of:
```
pnpm install jest --save-dev --recursive --filter=web --filter=@repo/ui --filter=@repo/web
```
<img width="848" alt="Screenshot 2025-05-12 at 10 18 22"
src="https://github.com/user-attachments/assets/7cdc1931-d9be-4c2c-9d5f-419911b34b75"
/>
<img width="1440" alt="Screenshot 2025-05-12 at 10 19 11"
src="https://github.com/user-attachments/assets/6246bbbd-9974-4fea-9d49-a23df2a870aa"
/>
### Testing Instructions
(I'm reading the Turborepo docs and testing)
1. Follow the [Getting Started
Tutorial](https://turborepo.com/docs/getting-started/installation)
2. Go to [[Best practices for dependency
installation](https://turborepo.com/docs/crafting-your-repository/managing-dependencies#best-practices-for-dependency-installation)](https://turborepo.com/docs/crafting-your-repository/managing-dependencies#best-practices-for-dependency-installation)
3. Try to run:
```
pnpm install jest --save-dev --recursive --filter=web --filter=@repo/ui --filter=@repo/web
```
<img width="740" alt="Screenshot 2025-05-12 at 10 20 50"
src="https://github.com/user-attachments/assets/65380834-d7d3-4091-935d-f338cc329bb6"
/>
