Upgrade storybooks to v6.3 (#22320)

This fixes a bug where lots of logspam was output on each recompile before. Also, this paves the road to webpack 5 and some other [neat things](storybookjs/storybook#14397).

package.json

@@ -114,22 +114,22 @@
     "@sourcegraph/prettierrc": "^3.0.3",
     "@sourcegraph/stylelint-config": "^1.3.0",
     "@sourcegraph/tsconfig": "^4.0.1",
-    "@storybook/addon-a11y": "^6.2.9",
-    "@storybook/addon-actions": "^6.2.9",
+    "@storybook/addon-a11y": "^6.3.0",
+    "@storybook/addon-actions": "^6.3.0",
     "@storybook/addon-console": "^1.2.1",
-    "@storybook/addon-knobs": "^6.2.9",
-    "@storybook/addon-links": "^6.2.9",
-    "@storybook/addon-storyshots": "^6.2.9",
-    "@storybook/addon-storyshots-puppeteer": "^6.2.9",
-    "@storybook/addon-toolbars": "^6.2.9",
-    "@storybook/addons": "^6.2.9",
-    "@storybook/api": "^6.2.9",
-    "@storybook/client-api": "^6.2.9",
-    "@storybook/components": "^6.2.9",
-    "@storybook/core": "^6.2.9",
-    "@storybook/core-events": "^6.2.9",
-    "@storybook/react": "^6.2.9",
-    "@storybook/theming": "^6.2.9",
+    "@storybook/addon-knobs": "^6.3.0",
+    "@storybook/addon-links": "^6.3.0",
+    "@storybook/addon-storyshots": "^6.3.0",
+    "@storybook/addon-storyshots-puppeteer": "^6.3.0",
+    "@storybook/addon-toolbars": "^6.3.0",
+    "@storybook/addons": "^6.3.0",
+    "@storybook/api": "^6.3.0",
+    "@storybook/client-api": "^6.3.0",
+    "@storybook/components": "^6.3.0",
+    "@storybook/core": "^6.3.0",
+    "@storybook/core-events": "^6.3.0",
+    "@storybook/react": "^6.3.0",
+    "@storybook/theming": "^6.3.0",
     "@terminus-term/to-string-loader": "^1.1.7-beta.1",
     "@testing-library/jest-dom": "^5.11.9",
     "@testing-library/react": "^10.4.8",