`useAgent` example references local tarball, not actual pacakge

[0xcad]

agent-kit/examples/use-agent/package.json

Line 16 in 6c9802f

"@inngest/agent-kit": "file:/Users/tedwerbel/Documents/code/agent-kit/packages/agent-kit/inngest-agent-kit-0.13.2.tgz",

See the above LOC. This references a local file on Ted Werbel's computer, not an actual package. The fix is pretty simple, just replace it with "@inngest/agent-kit": "^0.13.2",

[linear-code]

EXE-1732