build(deps): bump vega from 5.28.0 to 5.32.0

Bumps [vega](https://github.com/vega/vega) from 5.28.0 to 5.32.0.
- [Release notes](https://github.com/vega/vega/releases)
- [Commits](vega/vega@v5.28.0...v5.32.0)

---
updated-dependencies:
- dependency-name: vega
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

packages/core/package.json

@@ -70,7 +70,7 @@
         "snabbdom": "^3.6.2",
         "snabbdom-to-html": "^7.1.0",
         "turndown": "^7.1.3",
-        "vega": "^5.28.0",
+        "vega": "^5.32.0",
         "vega-embed": "^6.24.0",
         "vega-lite": "^5.17.0"
     },