chore: CRP-2694 remove the link to the deleted encrypted notes dapp (#5905)

Author: altkdf

docs/building-apps/security/resources.mdx

@@ -23,7 +23,7 @@ Below are resources which cover security best practices for technologies you are
 ## Crypto
 * [OWASP cryptographic failures](https://owasp.org/Top10/A02_2021-Cryptographic_Failures/) points out issues related to cryptography, or the lack thereof.
 * [OWASP application security verification standard](https://owasp.org/www-project-application-security-verification-standard/) (see Section V6)
-* **Use the [Web Crypto API](https://developer.mozilla.org/en-US/docs/Web/API/Web_Crypto_API).** Storing key material in the browser storage (such as [sessionStorage](https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage) or [localStorage](https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage)) is considered unsafe because these keys can be accessed by JavaScript code, e.g. in an XSS attack. To protect the private key from direct access, use Web Crypto's [generateKey](https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto/generateKey) with `extractable=false`. See also the [encrypted notes example](https://github.com/dfinity/examples/blob/master/motoko/encrypted-notes-dapp/src/frontend/src/lib/crypto.ts#L149-L159).
+* **Use the [Web Crypto API](https://developer.mozilla.org/en-US/docs/Web/API/Web_Crypto_API).** Storing key material in the browser storage (such as [sessionStorage](https://developer.mozilla.org/en-US/docs/Web/API/Window/sessionStorage) or [localStorage](https://developer.mozilla.org/en-US/docs/Web/API/Window/localStorage)) is considered unsafe because these keys can be accessed by JavaScript code, e.g. in an XSS attack. To protect the private key from direct access, use Web Crypto's [generateKey](https://developer.mozilla.org/en-US/docs/Web/API/SubtleCrypto/generateKey) with `extractable=false`.
 
 ## Web security
 * Resources for setting security headers: