fix: fixes cypress landing page test error for every new PR in 2025

[DevanjoyDas]

Description

This pull request addresses a failing Cypress end-to-end test on the landing page. The test, which verifies the heading contains the current year, was causing failures for new PRs in 2025 due to the dynamic year calculation.

To avoid prematurely changing the header to "AsyncAPI Conf On Tour 2025", the test has been updated to handle both the current year and the previous year dynamically to allow flexibility until the official event dates for 2025 are confirmed :

const Year = new Date().getFullYear();
   cy.getTestData("landing-heading").contains(new RegExp(`AsyncAPI Conf On Tour (${Year}|${Year-1})`));

Screenshot of the passing test case.

Important
Temporarily adjusted the test to allow flexibility until the official event dates for 2025 are confirmed.

Fixes #505

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[ashmit-coder]

LGTM!