Bump YoastSEO.js to 1.43.0

[manuelaugustin]

Summary

This PR can be summarized in the following changelog entry:

• n/a

Relevant technical choices:

• Updates YoastSEO.js to 1.43.0.

Test instructions

This PR can be tested by following these steps:

• Check whether nothing breaks; see also https://github.com/Yoast/Wiki/wiki/Testing-YoastSEO.js-version-bumps-on-Yoast-Components

[igorschoester]

Acceptance 👍