fix: Spec Explorer link in Docs

[dishafaujdar]

Describe the bug.

The browser requests in
https://github.com/asyncapi/website/blob/master/components/data/buckets.ts#L96
'Explorer,' but the App Router in
https://github.com/asyncapi/website/blob/master/components/layout/DocsLayout.tsx#L92
is looking for 'explorer.' It does not find it and returns an HTTP 404 error in the local environment.

This PR fixes the inconsistency, ensuring the link always returns the correct page after clicking on 'Docs / Specification Explorer'.

Expected behavior

When you go to https://www.asyncapi.com/docs/reference/specification/v3.0.0-explorer, it should render the page

Screenshots

How to Reproduce

1. go to https://www.asyncapi.com/docs/reference/specification/v3.0.0-Explorer this shows 404

🥦 Browser

Brave

👀 Have you checked for similar open issues?

• I checked and didn't find similar issue

🏢 Have you read the Contributing Guidelines?

• I have read the Contributing Guidelines

Are you willing to work on this issue ?

Yes I am willing to submit a PR!