chore(deps): update storybook monorepo to v7.6.20 (#5602)

Author: renovate[bot]

webview/package.json

@@ -40,10 +40,10 @@
   },
   "devDependencies": {
     "@storybook/addons": "7.6.17",
-    "@storybook/builder-webpack5": "7.6.19",
+    "@storybook/builder-webpack5": "7.6.20",
     "@storybook/preset-scss": "1.0.3",
-    "@storybook/react": "7.6.19",
-    "@storybook/react-webpack5": "7.6.19",
+    "@storybook/react": "7.6.20",
+    "@storybook/react-webpack5": "7.6.20",
     "@storybook/testing-library": "0.2.2",
     "@svgr/core": "^8.0.0",
     "@svgr/plugin-jsx": "^8.0.1",
@@ -73,7 +73,7 @@
     "raw-loader": "4.0.2",
     "sass": "1.77.6",
     "sass-loader": "13.3.3",
-    "storybook": "7.6.19",
+    "storybook": "7.6.20",
     "storybook-addon-themes": "6.1.0",
     "style-loader": "3.3.4",
     "stylelint": "15.11.0",