fix: remove date from whitepaper page #13645

[gks2022004]

remove date from the whitepaper page

Description

This pull request modifies the Static Layout component to hide the "Page last updated" text specifically on the Whitepaper page. The change involves adding a conditional check to prevent rendering the timestamp for the /whitepaper route.

The main changes include:

1. Added a condition to check both the slug and asPath before rendering the "Last Updated" text.
2. The text will now only render if the page is not the Whitepaper page.

Issue link

#13645
Fixes 13645 - remove date from whitepaper

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