docs: update skill name from docs-mainnet to docs (#170)

Author: letstokenize

src/pages/guide/using-tempo-with-ai.mdx

@@ -47,7 +47,7 @@ codex exec "Read https://tempo.xyz/SKILL.md and set up Tempo Wallet"
 Install the Tempo Docs skill to give AI coding agents access to Tempo documentation, source code via MCP, and examples:
 
 ```bash
-npx skills add tempoxyz/docs-mainnet
+npx skills add tempoxyz/docs
 ```
 
 Once installed, the agent uses it automatically when relevant tasks are detected.