Use canonical link for all RFC references

[YATIN072007]

Closes #189

Updating all RFC references in the modified files to use a single, canonical source. All RFC links now point to their canonical URLs, which improves consistency and avoids redirects or unofficial mirrors.

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[YATIN072007]

@HamdaanAliQuatil
Kindly review...

[jonasfj]

PR #246 suggests this PR should not be landed.

I haven't reviewed any of it yet, but PR for a PR that hasn't landed suggests we should land this.

[YATIN072007]

@jonasfj @HamdaanAliQuatil
Fixed the key leak issue which was generated in the first two commits, kindly review

[HamdaanAliQuatil]

Hey @YATIN072007 - looks like this PR has some bleed-through from #243. I’m seeing changes related to making examples self-contained/runnable, which isn’t part of this issue.

Could you split those into a PR #243 and revert them here so we can land this one quickly?

[HamdaanAliQuatil]

lgtm. thank you for the PR 🚀