build(deps): bump storybook from 8.6.14 to 8.6.15 in /docs-ui

Bumps [storybook](https://github.com/storybookjs/storybook/tree/HEAD/code/core) from 8.6.14 to 8.6.15.
- [Release notes](https://github.com/storybookjs/storybook/releases)
- [Changelog](https://github.com/storybookjs/storybook/blob/next/CHANGELOG.md)
- [Commits](https://github.com/storybookjs/storybook/commits/v8.6.15/code/core)

---
updated-dependencies:
- dependency-name: storybook
  dependency-version: 8.6.15
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

docs-ui/package.json

@@ -38,7 +38,7 @@
     "react": "19.1.1",
     "react-dom": "19.1.1",
     "shiki": "^3.13.0",
-    "storybook": "^8.6.12"
+    "storybook": "^8.6.15"
   },
   "devDependencies": {
     "@octokit/rest": "^22.0.1",

docs-ui/yarn.lock

@@ -1240,11 +1240,11 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@storybook/core@npm:8.6.14":
-  version: 8.6.14
-  resolution: "@storybook/core@npm:8.6.14"
+"@storybook/core@npm:8.6.15":
+  version: 8.6.15
+  resolution: "@storybook/core@npm:8.6.15"
   dependencies:
-    "@storybook/theming": "npm:8.6.14"
+    "@storybook/theming": "npm:8.6.15"
     better-opn: "npm:^3.0.2"
     browser-assert: "npm:^1.2.1"
     esbuild: "npm:^0.18.0 || ^0.19.0 || ^0.20.0 || ^0.21.0 || ^0.22.0 || ^0.23.0 || ^0.24.0 || ^0.25.0"
@@ -1260,7 +1260,7 @@ __metadata:
   peerDependenciesMeta:
     prettier:
       optional: true
-  checksum: 10/8f8c811edd4ea8dcedcc63a79b3168dc83aa0401e3760990cb5995ea6beaac4026c6ccc1046182f41eed7c09333005f3348d8b42f89fc5dd5b2ce011a9d2a48f
+  checksum: 10/d268d6fa00c38b35e5c363ee33779c2e087ab8e4681e0e205baa2fdb2780ea9feda3c9f6db35d60092778878d2782b2093c744bdf1af173c5688c3e1e0e960ac
   languageName: node
   linkType: hard
 
@@ -1334,6 +1334,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@storybook/theming@npm:8.6.15":
+  version: 8.6.15
+  resolution: "@storybook/theming@npm:8.6.15"
+  peerDependencies:
+    storybook: ^8.2.0 || ^8.3.0-0 || ^8.4.0-0 || ^8.5.0-0 || ^8.6.0-0
+  checksum: 10/f02760831a13d7af9dbfeb6feea949f4c13c897861cbc75253a6776d133891567889c8d99c7e91a99124d0772c3bde1f978984c83b19117d1d7c908ed7eb8409
+  languageName: node
+  linkType: hard
+
 "@swc/helpers@npm:0.5.15":
   version: 0.5.15
   resolution: "@swc/helpers@npm:0.5.15"
@@ -2539,7 +2548,7 @@ __metadata:
     react: "npm:19.1.1"
     react-dom: "npm:19.1.1"
     shiki: "npm:^3.13.0"
-    storybook: "npm:^8.6.12"
+    storybook: "npm:^8.6.15"
     typescript: "npm:^5"
     unified: "npm:^11.0.4"
   languageName: unknown
@@ -6473,11 +6482,11 @@ __metadata:
   languageName: node
   linkType: hard
 
-"storybook@npm:^8.6.12":
-  version: 8.6.14
-  resolution: "storybook@npm:8.6.14"
+"storybook@npm:^8.6.15":
+  version: 8.6.15
+  resolution: "storybook@npm:8.6.15"
   dependencies:
-    "@storybook/core": "npm:8.6.14"
+    "@storybook/core": "npm:8.6.15"
   peerDependencies:
     prettier: ^2 || ^3
   peerDependenciesMeta:
@@ -6487,7 +6496,7 @@ __metadata:
     getstorybook: ./bin/index.cjs
     sb: ./bin/index.cjs
     storybook: ./bin/index.cjs
-  checksum: 10/104932fe29ebf49bef24c90285741cec964d1c36b3f0b38da1dace31ac664be457f2a510e41ba69fe8aa0d90c20e3446fec27d1ced41e5eefb3a9ca713d99e79
+  checksum: 10/15762c79ec8444a46bc14cddfadbdd54dfd379828acd38555887a246c01e7c9ebb61e4eafafe04efb3ddf6278fb47035216e7f7d9f94fc205da148870173abdf
   languageName: node
   linkType: hard