chore(docs): correct 'Edit this page' URL for dev docs (#4433)

# Description

## Problem*

The "Edit this page" button in the generated documentation for the
`noir-lang` project leads to a 404 - Page Not Found error for documents
in the development version. This issue is due to the button's link
containing `/processed-docs` in the path instead of `/docs`. The problem
affects the development version of the documentation, whereas versioned
documentation (e.g., v0.23.0) correctly links to editable markdown files
on GitHub.

| Before | After |
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![Before](https://github.com/noir-lang/noir/assets/150683513/260f8eb5-4ef9-46db-ba39-ae836d2bb7de)
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![After](https://github.com/noir-lang/noir/assets/150683513/087e2c8c-b9dc-4c35-b824-2b95742872f6)
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## Summary*

This pull request fixes the incorrect URL generated for the "Edit this
page" button in the docusaurus configuration. By modifying the `editUrl`
function within `docusaurus.config.ts`, the path now correctly replaces
`processed-docs` with `docs` for the development version of the
documentation. This change guarantees that contributors are directed to
the correct GitHub page to edit the documentation, thus eliminating the
404 error previously encountered.

## Additional Context

The issue was identified when attempting to edit pages from the
development version of the docs. The button's link incorrectly pointed
to a non-existent path due to the inclusion of `processed-docs` in the
URL.

## Documentation*

- [ ] No documentation needed.
- [x] Documentation included in this PR.
- [ ] **[Exceptional Case]** Documentation to be submitted in a separate
PR.

# PR Checklist*

- [x] I have tested the changes locally.
- [x] I have formatted the changes with [Prettier](https://prettier.io/)
and/or `cargo fmt` on default settings.

Co-authored-by: Tom French <[email protected]>

docs/docusaurus.config.ts

@@ -38,7 +38,7 @@ export default {
             },
           },
           editUrl: ({ versionDocsDirPath, docPath }) =>
-            `https://github.com/noir-lang/noir/edit/master/docs/${versionDocsDirPath}/${docPath}`,
+            `https://github.com/noir-lang/noir/edit/master/docs/${versionDocsDirPath.replace('processed-docs', 'docs')}/${docPath}`,
         },
         blog: false,
         theme: {