chore(deps): bump actions/cache from 4 to 5

Bumps [actions/cache](https://github.com/actions/cache) from 4 to 5.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v4...v5)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/build-linux-iso.yml

@@ -65,21 +65,21 @@ jobs:
         run: bun install --frozen-lockfile || bun install --no-frozen-lockfile
 
       - name: Restore model cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/usbeliza-build/models
           key: elizaos-model-cache-${{ hashFiles('packages/os/linux/variants/milady-tails/Justfile') }}
           restore-keys: elizaos-model-cache-
 
       - name: Restore CLI cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ~/.cache/usbeliza-build/cli
           key: elizaos-cli-cache-${{ hashFiles('packages/os/linux/variants/milady-tails/Justfile') }}
           restore-keys: elizaos-cli-cache-
 
       - name: Restore live-build chroot/debs cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             packages/os/linux/variants/milady-tails/tails/cache
@@ -93,7 +93,7 @@ jobs:
           targets: x86_64-unknown-linux-gnu
 
       - name: Cache Rust build
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             ~/.cargo/registry

.github/workflows/build-vm-image.yml

@@ -55,7 +55,7 @@ jobs:
         run: bun install --frozen-lockfile || bun install --no-frozen-lockfile
 
       - name: Cache upstream Debian image
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: packages/os/linux/vm/disk-base/.cache
           key: elizaos-vm-upstream-${{ hashFiles('packages/os/linux/vm/disk-base/mmdebstrap.recipe') }}