chore(deps): update dependency posthog-js to ^1.261.8

Author: renovate[bot]

package.json

@@ -47,7 +47,7 @@
 		"marked": "^16.2.1",
 		"mode-watcher": "^1.1.0",
 		"octokit": "^5.0.3",
-		"posthog-js": "^1.261.7",
+		"posthog-js": "^1.261.8",
 		"posthog-node": "^5.8.2",
 		"prettier": "^3.6.2",
 		"prettier-plugin-svelte": "^3.4.0",