fix: avoid flash of page scrolling to top on refresh

[slorber]

Pre-flight checklist

• I have read the Contributing Guidelines on pull requests.
• If this is a code change: I have written unit tests and/or added dogfooding pages to fully verify the new behavior.
• If this is a new API or substantial change: the PR has an accompanying issue (closes #0000) and the maintainers have approved on my working plan.

Motivation

Fix regression of #6732

On page refresh, we scroll to top for a while instead of keeping previous scroll position

The code that scrolls to top/anchor after a navigation should not be executed on first page load (like it used to be)

Test Plan

preview does not

Test links

Deploy preview: https://deploy-preview-_____--docusaurus-2.netlify.app/

Related issues/PRs

#6732

[netlify]

✅ [V2]

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[github-actions]

⚡️ Lighthouse report for the deploy preview of this PR

URL	Performance	Accessibility	Best Practices	SEO	PWA	Report
/	🟠 66	🟢 100	🟢 100	🟢 100	🟢 90	Report
/docs/installation	🟠 88	🟢 99	🟢 100	🟢 100	🟢 90	Report

[Josh-Cena]

It works 👍

[github-actions]

Size Change: +17 B (0%)

Total Size: 807 kB

ℹ️ View Unchanged

Filename	Size	Change
website/.docusaurus/globalData.json	51.3 kB	0 B
website/build/assets/css/styles.********.css	105 kB	0 B
website/build/assets/js/main.********.js	612 kB	+17 B (0%)
website/build/index.html	38.8 kB	0 B

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