docs: tidy up dependency pinning essay

[HonkingGoose]

Changes:

• Capitalize noun SemVer
• Fix white-space on list items
• Remove extra word to
• Be clearer that a reader can skip the "wall of text" and jump to the recommendations at the bottom of the page

Context:

Helps with issue #7626.

I was thinking of making a bigger edit to really clean up the text, but I don't know if you want that or not.
For now this just fixes the simple stuff without changing the "tone/voice" of the text.

Documentation (please check one with an [x])

• I have updated the documentation, or
• No documentation update is required

How I've tested my work (please tick one)

I have verified these changes via:

• Code inspection only, or
• Newly added unit tests, or
• Unit tests + ran on a real repository

[renovate-release]

🎉 This PR is included in version 23.100.3 🎉

The release is available on:

• GitHub release
• 23.100.3

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