[DX-1682] Release Notes 5.5.1 Gateway

[dcs3spp]

For internal users - Please add a Jira DX PR ticket to the subject!

DX-1682

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Description

Add Gateway release notes for Gateway 5.5.1

Screenshots (if appropriate)

Checklist

• [x] I have added a preview link to the PR description.
• [x] I have reviewed the suggestions made by our AI (PR Agent) and updated them accordingly (spelling errors, rephrasing, etc.)
• [x] I have reviewed the guidelines for contributing to this repository.
• [x] I have read the technical guidelines for contributing to this repository.
• [x] Make sure you have started your change off our latest master.
• [x] I labeled the PR

  Category	Suggestion	Score
  Enhancement	Replace the placeholder release date with the actual date ___ **Replace the placeholder "?? September 2024" with the actual release date to provide accurate information.** [tyk-docs/content/product-stack/tyk-gateway/release-notes/version-5.5.md [20]](https://github.com/TykTechnologies/tyk-docs/pull/5398/files#diff-38c96e78461917033740cb3c935527340524536d7182c1883e89215261dbb496R20-R20) ```diff -### Release Date ?? September 2024 +### Release Date 25 September 2024 ``` Suggestion importance[1-10]: 8 Why: Replacing the placeholder with the actual release date is crucial for providing accurate and reliable information to the users.	8
  	Update the Helm Chart version information from TBP to the actual version number ___ **Specify the exact version of Helm Chart v1.7 instead of "To Be Published (TBP)" once it is available to provide clear and actionable information.** [tyk-docs/content/product-stack/tyk-gateway/release-notes/version-5.5.md [35]](https://github.com/TykTechnologies/tyk-docs/pull/5398/files#diff-38c96e78461917033740cb3c935527340524536d7182c1883e89215261dbb496R35-R35) ```diff -| | Helm Chart v1.7 To Be Published (TBP) | Helm all versions | +| | Helm Chart v1.7 | Helm all versions | ``` Suggestion importance[1-10]: 7 Why: Specifying the exact version of the Helm Chart once available will enhance clarity and provide actionable information, but it is not critical until the version is released.	7
  	Add descriptions to changelog items for better clarity ___ **Add a brief description or summary for each changelog item under the "Added", "Changed", and "Fixed" sections to provide more context to the reader.** [tyk-docs/content/product-stack/tyk-gateway/release-notes/version-5.5.md [78]](https://github.com/TykTechnologies/tyk-docs/pull/5398/files#diff-38c96e78461917033740cb3c935527340524536d7182c1883e89215261dbb496R78-R78) ```diff - Changelog item + Changelog item: Description of what was added or changed ``` Suggestion importance[1-10]: 6 Why: Adding descriptions to changelog items would improve clarity and provide more context, enhancing the reader's understanding of the changes.	6

[netlify[bot]]

✅ PS. Pls add /docs/nightly to the end of url

Name	Link
🔨 Latest commit	b33df8a6aea567267539a3dd58ef08edbb30ae02
🔍 Latest deploy log	https://app.netlify.com/sites/tyk-docs/deploys/66e1bef22225900008d6571e
😎 Deploy Preview	https://deploy-preview-5398--tyk-docs.netlify.app
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[netlify[bot]]

✅ PS. Pls add /docs/nightly to the end of url

Name	Link
🔨 Latest commit	7df2a9d8231ce04c36c122a429b71a4b230de84b
🔍 Latest deploy log	https://app.netlify.com/sites/tyk-docs/deploys/66f55ea0a70f3600088ee2d9
😎 Deploy Preview	https://deploy-preview-5398--tyk-docs.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

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[dcs3spp]

@caroltyk Please check Tyk charts version associated with release notes 5.5.1 is correct and update accordingly.

After this PR has been published please create a separate PR to include a download link for Tyk Charts when released.

[sharadregoti]

/release to release-5.5

[tykbot[bot]]

Working on it! Note that it can take a few minutes.

[tykbot[bot]]

@sharadregoti Succesfully merged PR