Bump brace-expansion to 5.0.12 in cookbook project

[stefangutica]

Description of the pull request (what is new / what has changed)

The Cookbook TS verification workflow fails on every PR since two high advisories were published for brace-expansion 5.0.9, used by the cookbook project (@multiversx/sdk-dapp-ui > @stencil/react-output-target > ts-morph > minimatch):

• GHSA-qhr7-859c-m2p7 (>=4.0.0 <5.0.11)
• GHSA-6j4f-fj2g-mc7p (>=4.0.0 <5.0.10)

This bumps brace-expansion to 5.0.12, which fixes both and the moderate GHSA-q2hr-2g5m-vwhr:

• testing/cookbook-ts/project/package.json: the brace-expansion override goes from ^5.0.9 to ^5.0.12.
• testing/cookbook-ts/project/package-lock.json: only the brace-expansion entry changes (version, resolved, integrity). 5.0.12 has the same dependencies and engines as 5.0.9.

Checked locally: node ./testing/cookbook-ts/audit-project.mjs passes (0 high, 0 critical), npm ci --dry-run accepts the lockfile, and ./testing/cookbook-ts-ci.sh passes, building all 61 cookbook projects.

Did you test the changes locally ?

• yes
• no

Did you regenerate static/llms.txt and static/llms-full.txt ? (happens at build time)

• yes
• no

Which category (categories) does this pull request belong to?

• document new feature
• update documentation that is not relevant anymore
• add examples or more information about a component
• fix grammar issues
• other