chore(deps): update dependency shiki to v3.15.0

Author: renovate[bot]

docs-site/package.json

@@ -39,7 +39,7 @@
 		"rehype-slug": "6.0.0",
 		"rehype-wrap-all": "1.1.0",
 		"semver": "7.7.3",
-		"shiki": "3.13.0",
+		"shiki": "3.15.0",
 		"svelte": "5.39.6",
 		"svelte-check": "4.3.3",
 		"svelte-fluent-examples": "workspace:^",