Add PyLadiesCon 2023 (#295)

It's an online event, the rooms are mostly there do separate timezones
it seems.

menu/pyladiescon_2023.json

@@ -0,0 +1,24 @@
+{
+	"version": 2023112101,
+	"url": "https://pretalx.com/pyladiescon-2023/schedule/export/schedule.xml",
+	"title": "PyLadiesCon 2023",
+	"start": "2023-12-01",
+	"end": "2023-12-03",
+	"timezone": "Etc/UTC",
+	"metadata": {
+		"links": [
+			{
+				"url": "https://pyladies.com/",
+				"title": "Website"
+			},
+			{
+				"url": "https://events.hubilo.com/pyladiescon2023/register",
+				"title": "Register"
+			},
+			{
+				"url": "https://conference.pyladies.com/about.html#coc",
+				"title": "Code of conduct"
+			}
+		]
+	}
+}