build(deps): update prop-types requirement from ^15.6.2 to ^15.8.1 in /superset-frontend/plugins/legacy-preset-chart-nvd3 (#26480)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

superset-frontend/plugins/legacy-preset-chart-nvd3/package.json

@@ -37,7 +37,7 @@
     "lodash": "^4.17.11",
     "moment": "^2.20.1",
     "nvd3-fork": "^2.0.5",
-    "prop-types": "^15.6.2",
+    "prop-types": "^15.8.1",
     "urijs": "^1.19.8"
   },
   "peerDependencies": {