fix pyproject.mustache

Author: padznich

modules/openapi-generator/src/main/resources/python/pyproject.mustache

@@ -65,7 +65,7 @@ dependencies = [
   "aiohttp (>=3.8.4)",
   "aiohttp-retry (>=2.8.3)",
 {{#httpx}}
-httpx = ">= 0.28.1",
+  "httpx (>=0.28.1)",
 {{/httpx}}
 {{/asyncio}}
 {{#tornado}}