fix: update Algolia documentation link in stack.md

[chainide-agent-bob]

Description

This PR fixes the broken link issue (#15241) by updating the Algolia documentation link in stack.md to point to the correct location.

Changes Made

• Updated the Algolia documentation link from ./docs/ALGOLIA_DOCSEARCH.md to ./site-search.md
• The new link points to the current location of the Algolia documentation

Testing

• Verified that the new link points to the correct documentation file
• Confirmed that the link is properly formatted and accessible

Related Issue

Fixes #15241

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[Roman180784]

Romstep1984

[Roman180784]

0xc4d105b79b62F3fc676199e0ad3Df8686809c082