bring the README header in line with the awesome guidelines

[kanywst]

What does this PR add?

Three header issues that awesome-lint does not check but the submission guidelines do. All three are in the first eight lines.

1. The description described the list, not the topic.

- > Authorization and access control: policy engines, standards, services, and learning resources.
+ > Determining what an authenticated user or service is permitted to do.

The old line read out the table of contents without ever saying what authorization is. That is the shape the guidelines reject (❌ Resources and tools for iOS development. vs ✅ Mobile operating system for Apple phones and tablets.), and it is what got #1042 and #2607 sent back.

2. The heading and the logo both said "Awesome Authorization".

Don't include both a title saying Awesome X and a logo with Awesome X.

media/logo.svg carried the wordmark in two <text> elements. Those are gone; the shield mark remains and the Markdown heading is now the only place the name appears. The viewBox is cropped to the mark and given explicit dimensions since the width can no longer be set from the img tag.

3. The logo linked nowhere.

The image should link to the project website or any relevant website.

It now links back to the repo. Switching from a raw <img> to a Markdown image-link also means no new MD033 inline-HTML violations — the count stays at the one pre-existing <div align="center">.

Checks

• markdownlint-cli2: 1 issue, the pre-existing <div>. No regression.
• awesome-lint on the file: no content errors; heading and badge rules still satisfied.

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📥 Commits

Reviewing files that changed from the base of the PR and between ed9bf1c and 03cc9df.

⛔ Files ignored due to path filters (1)

• media/logo.svg is excluded by !**/*.svg

📒 Files selected for processing (1)

• README.md

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[claude]

Reviewed against the curation/description/category/duplicate/header checklist: this diff only touches the README header (description line) and media/logo.svg, no list entries changed, so items 1–4 don't apply here. The three header fixes hold up: the blockquote now describes the topic itself (README.md:9) rather than restating the Contents section, the logo's wordmark <text> elements are gone so "Awesome Authorization" only appears once (the heading), and the logo is now a Markdown image-link to the repo (README.md:5) instead of a bare <img>, so no new MD033 hits are introduced. Contents section (README.md:13-21) is untouched and still matches the headings below it. Clean — no findings.