Fix qa bugs

[AlbionaHoti]

What :computer:

• Fixed a couple of minor issues reported by QA team Artem.

Why :hand:

• Without those users would click on missing links, run into issues when running a particular command, etc.

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit 94fd026):

https://zksync-docs-staging-5eb09--pr46-fix-qa-bugs-9hzemet1.web.app

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