Bump @blockly/field-colour from 6.0.12 to 13.2.0 in /frontend

Bumps [@blockly/field-colour](https://github.com/RaspberryPiFoundation/blockly-samples/tree/HEAD/plugins/field-colour) from 6.0.12 to 13.2.0.
- [Release notes](https://github.com/RaspberryPiFoundation/blockly-samples/releases)
- [Changelog](https://github.com/RaspberryPiFoundation/blockly-samples/blob/main/plugins/field-colour/CHANGELOG.md)
- [Commits](https://github.com/RaspberryPiFoundation/blockly-samples/commits/v13.2.0/plugins/field-colour)

---
updated-dependencies:
- dependency-name: "@blockly/field-colour"
  dependency-version: 13.2.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

frontend/package-lock.json

@@ -33,7 +33,7 @@
     "vitest": "^4.1.10"
   },
   "dependencies": {
-    "@blockly/field-colour": "^6.0.12",
+    "@blockly/field-colour": "^13.2.0",
     "@blockly/shadow-block-converter": "^7.0.10",
     "@blockly/workspace-minimap": "^0.3.9",
     "blockly": "^12.5.1",