chore(deps): update dependency vitepress to ^0.19.0 (#679)

Co-authored-by: Renovate Bot <[email protected]>

Author: renovate[bot]

package.json

@@ -132,7 +132,7 @@
     "ts-jest": "^26.5.4",
     "typescript": "4.2.3",
     "typescript-eslint-language-service": "^4.1.3",
-    "vitepress": "^0.18.0",
+    "vitepress": "^0.19.0",
     "vue": "^3.2.4",
     "yarn-deduplicate": "^3.1.0",
     "yorkie": "^2.0.0"