fix: storybook dependencies aren't resolving (#166)

This is because upstream marks 8.6.14 as "latest" for 3 of the
subpackages, but 8.6.15 as "latest" for all others. This confuses
npm heavily.

And yes, ideally we upgrade to 10, but that is for another
day. First we unbreak building this repo!

package.json

@@ -29,8 +29,8 @@
     "@rollup/plugin-commonjs": "^25",
     "@rollup/plugin-node-resolve": "^15",
     "@rollup/plugin-terser": "^0",
-    "@storybook/addon-essentials": "^8",
-    "@storybook/addon-interactions": "^8",
+    "@storybook/addon-essentials": "8.6.15",
+    "@storybook/addon-interactions": "8.6.15",
     "@storybook/addon-links": "^8",
     "@storybook/addon-webpack5-compiler-babel": "^3",
     "@storybook/blocks": "^8",
@@ -38,7 +38,7 @@
     "@storybook/react": "^8",
     "@storybook/react-webpack5": "^8",
     "@storybook/test": "^8",
-    "@storybook/types": "^8",
+    "@storybook/types": "8.6.15",
     "@types/react": "^18",
     "@types/react-dom": "^18",
     "@typescript-eslint/eslint-plugin": "^7",