build(deps): bump the major group with 2 updates

Bumps the major group with 2 updates: [astral-sh/setup-uv](https://github.com/astral-sh/setup-uv) and [actions/cache](https://github.com/actions/cache).


Updates `astral-sh/setup-uv` from 7.0.0 to 8.2.0
- [Release notes](https://github.com/astral-sh/setup-uv/releases)
- [Commits](astral-sh/setup-uv@eb1897b...fac544c)

Updates `actions/cache` from 4.2.0 to 5.0.5
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@1bd1e32...27d5ce7)

---
updated-dependencies:
- dependency-name: astral-sh/setup-uv
  dependency-version: 8.2.0
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: major
- dependency-name: actions/cache
  dependency-version: 5.0.5
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: major
...

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

Author: dependabot[bot]

.github/workflows/sign-agent-card.yml

@@ -24,12 +24,12 @@ jobs:
           python-version: "3.13"
 
       - name: Install UV
-        uses: astral-sh/setup-uv@eb1897b8dc4b5d5bfe39a428a8f2304605e0983c # v7.0.0
+        uses: astral-sh/setup-uv@fac544c07dec837d0ccb6301d7b5580bf5edae39 # v8.2.0
         with:
           version: "latest"
 
       - name: Cache UV dependencies
-        uses: actions/cache@1bd1e32a3bdc45362d1e726936510720a7c30a57 # v4.2.0
+        uses: actions/cache@27d5ce7f107fe9357f9df03efb73ab90386fccae # v5.0.5
         with:
           path: ~/.cache/uv
           key: ${{ runner.os }}-uv-sigstore-a2a-293f9bd