docs: use https:// for GitHub link in create-onchain-agent READMEs

[memosr]

Summary

Both create-onchain-agent README files (TypeScript and Python) link to the AgentKit GitHub repo via http://github.com instead of https://github.com.

Changes

typescript/create-onchain-agent/README.md (line 66):

- - **GitHub Repo:** [http://github.com/coinbase/agentkit](http://github.com/coinbase/agentkit)
+ - **GitHub Repo:** [https://github.com/coinbase/agentkit](https://github.com/coinbase/agentkit)

python/create-onchain-agent/README.md (line 91):

- - **GitHub Repo:** [http://github.com/coinbase/agentkit](http://github.com/coinbase/agentkit)
+ - **GitHub Repo:** [https://github.com/coinbase/agentkit](https://github.com/coinbase/agentkit)

Why it matters

GitHub has required HTTPS since 2018, so the HTTP URL works only via an immediate 301 redirect. Beyond the redirect cost:

• Corporate proxies and link checkers often flag http://github.com as insecure
• Some security scanners block http:// external links in documentation entirely
• The http:// link sets a bad example for users learning to build onchain agents

Verification

• ✅ Only 2 README files modified
• ✅ Both the link label and the URL updated in each file
• ✅ No other content touched

[cb-heimdall]

🟡 Heimdall Review Status

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Reviews	🟡 0/1	Denominator calculation Show calculation 1 if user is bot 0 1 if user is external 0 2 if repo is sensitive 0 From .codeflow.yml 1 Additional review requirements Show calculation Max 0 0 From CODEOWNERS 0 Global minimum 0 Max 1 1 1 if commit is unverified 1 Sum 2