fix(docs): replace broken /apps/introduction/overview link with /apps

[ygd58]

Closes #1308.

The link to /apps/introduction/overview in verify-social-accounts guide returns 404 because the page has hidden: true in its frontmatter.

Replaced with /apps which returns 200.

Affected file: docs/base-account/guides/verify-social-accounts.mdx line 435

[cb-heimdall]

🟡 Heimdall Review Status

Requirement	Status	More Info
Reviews	🟡 0/2	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

[ygd58]

@roethke @soheimam Could you please review this PR? Found a broken link — /apps/introduction/overview returns 404 because the page has hidden: true. Fixed by replacing with /apps. Thanks!