Add blog post announcing CSP nonce support in Link

[brettdorrans]

Description

Announces the new nonce option in the Link, Connections, and Bank Feeds SDKs, which lets clients drop unsafe-inline from their CSP style-src directive. Builds on the SDK docs added in #1800.

Type of change

• New document(s)/updating existing

Test plan

• Local build renders the post correctly (npm start)
• Author avatar resolves for brettdorrans in authors.yml
• In-page link to /auth-flow/customize/sdk-customize-code#csp-nonce resolves

🤖 Generated with Claude Code

[vercel]

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Project	Deployment	Actions	Updated (UTC)
codat-docs	Ready	Preview, Comment	Apr 27, 2026 6:02pm

[github-actions]

Link check results for preview deployment (https://codat-docs-git-csp-blog-post-codat.vercel.app):

[
  "[404] https://docs.codat.io/updates/260427-csp-nonce-link",
  "[404] https://docs.codat.io/updates/260427-csp-nonce-link",
  "[404] https://docs.codat.io/updates/260427-csp-nonce-link",
  "[404] https://docs.codat.io/updates/260427-csp-nonce-link",
  "[404] https://codat-docs-git-csp-blog-post-codat.vercel.app/enterprise/tech-overview/architecture/platform-as-a-service",
  "[404] https://codat-docs-git-csp-blog-post-codat.vercel.app/auth-flow//auth-flow/build/build-your-own-authorization-journey",
  "[404] https://codat-docs-git-csp-blog-post-codat.vercel.app/enterprise/tech-overview/architecture/platform-as-a-service/",
  "[404] https://codat-docs-git-csp-blog-post-codat.vercel.app/auth-flow/auth-flow/build/build-your-own-authorization-journey/",
  "[404] https://codat-docs-git-csp-blog-post-codat.vercel.app/enterprise/tech-overview/architecture/platform-as-a-service",
  "[404] https://codat-docs-git-csp-blog-post-codat.vercel.app/enterprise/tech-overview/architecture/platform-as-a-service/",
  "[404] https://codat-docs-git-csp-blog-post-codat.vercel.app/auth-flow/auth-flow/build/build-your-own-authorization-journey/",
  "[404] https://codat-docs-git-csp-blog-post-codat.vercel.app/auth-flow//auth-flow/build/build-your-own-authorization-journey"
]