fix(deps): update dependency vega to v6 [security] (#918)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

packages/web-components/src/components/chat/package.json

@@ -45,7 +45,7 @@
     "mathjax": "^3.2.2",
     "mermaid": "^11.2.1",
     "smiles-drawer": "^2.1.7",
-    "vega": "^5.28.0",
+    "vega": "^6.0.0",
     "vega-embed": "^6.24.0",
     "vega-lite": "^5.17.0"
   },