Update dependency stylelint to v16.26.0

| datasource | package   | from    | to      |
| ---------- | --------- | ------- | ------- |
| npm        | stylelint | 16.25.0 | 16.26.0 |


## [v16.26.0](https://github.com/stylelint/stylelint/blob/HEAD/CHANGELOG.md#16260---2025-11-21)

It adds 1 feature and fixes 2 bugs.

- Added: support for `customSyntax` with function export ([#8834](stylelint/stylelint#8834)) ([@silverwind](https://github.com/silverwind)).
- Fixed: `custom-property-no-missing-var-function` false positives for style query in `if()` function ([#8813](stylelint/stylelint#8813)) ([@sajdakabir](https://github.com/sajdakabir)).
- Fixed: `media-feature-range-notation` false positives for multiple queries and `except: exact-value` ([#8832](stylelint/stylelint#8832)) ([@jeddy3](https://github.com/jeddy3)).

Author: renovate[bot]

package.json

@@ -51,7 +51,7 @@
     "react": "17.0.2",
     "react-dom": "17.0.2",
     "strong-mock": "~8.0.1",
-    "stylelint": "16.25.0",
+    "stylelint": "16.26.0",
     "stylelint-config-recommended": "17.0.0",
     "stylelint-config-styled-components": "0.1.1",
     "stylelint-processor-styled-components": "1.10.0",