fix: packages/react-docs/package.json to reduce vulnerabilities

The following vulnerabilities are fixed with an upgrade:
- https://snyk.io/vuln/SNYK-JS-ECHARTS-16874133

Author: snyk-bot

packages/react-docs/package.json

@@ -33,7 +33,7 @@
     "@patternfly/react-table": "workspace:^",
     "@patternfly/react-templates": "workspace:^",
     "@patternfly/react-tokens": "workspace:^",
-    "echarts": "^5.6.0 || ^6.0.0",
+    "echarts": "^6.1.0",
     "victory": "^37.3.6"
   },
   "devDependencies": {