NPM: Bump the npm-dependencies group with 2 updates

Bumps the npm-dependencies group with 2 updates: [vega-tooltip](https://github.com/vega/vega-tooltip) and [postcss](https://github.com/postcss/postcss).


Updates `vega-tooltip` from 0.34.0 to 0.35.1
- [Release notes](https://github.com/vega/vega-tooltip/releases)
- [Changelog](https://github.com/vega/vega-tooltip/blob/main/CHANGELOG.md)
- [Commits](vega/vega-tooltip@v0.34.0...v0.35.1)

Updates `postcss` from 8.4.47 to 8.4.48
- [Release notes](https://github.com/postcss/postcss/releases)
- [Changelog](https://github.com/postcss/postcss/blob/main/CHANGELOG.md)
- [Commits](postcss/postcss@8.4.47...8.4.48)

---
updated-dependencies:
- dependency-name: vega-tooltip
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: npm-dependencies
- dependency-name: postcss
  dependency-type: direct:development
  update-type: version-update:semver-patch
  dependency-group: npm-dependencies
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

package-lock.json

@@ -13,12 +13,12 @@
         "highlight.js": "^11.10.0",
         "normalize.css": "^8.0.1",
         "vega": "^5.30.0",
-        "vega-tooltip": "^0.34.0"
+        "vega-tooltip": "^0.35.1"
     },
     "devDependencies": {
         "esbuild": "^0.24.0",
         "esbuild-sass-plugin": "^3.3.1",
-        "postcss": "^8.4.47",
+        "postcss": "^8.4.48",
         "prettier": "^3.3.3",
         "stylelint": "^16.10.0",
         "stylelint-config-standard-scss": "^13.1.0",