Use the category term in the package description (#101)

## Summary

The PyPI description said "agent commerce" where the category term is
"agentic commerce", and carried an em-dash; both fixed. Ships to PyPI
with the next tagged release.

## Public API impact

None; metadata only.

## Test plan

Description string only; no behavior change. CI runs the standard suite.

Co-authored-by: Claude Fable 5 <noreply@anthropic.com>

Author: vvillait88

pyproject.toml

@@ -5,7 +5,7 @@ build-backend = "hatchling.build"
 [project]
 name = "agentscore-commerce"
 version = "2.5.14"
-description = "Agent commerce SDK for Python — identity middleware (FastAPI, Flask, Django, AIOHTTP, Sanic, ASGI) + payment helpers + 402 builders + discovery + Stripe multichain. The full merchant-side toolkit for AgentScore-powered agent commerce."
+description = "Agentic commerce SDK for Python: identity middleware (FastAPI, Flask, Django, AIOHTTP, Sanic, ASGI) + payment helpers + 402 builders + discovery + Stripe multichain. The full merchant-side toolkit for AgentScore-powered agentic commerce."
 readme = "README.md"
 license = "MIT"
 requires-python = ">=3.11"