chore(deps): bump actions/cache from 4.3.0 to 6.1.0

Bumps [actions/cache](https://github.com/actions/cache) from 4.3.0 to 6.1.0.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@0057852...55cc834)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: 6.1.0
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

.github/workflows/contracts.yml

@@ -60,7 +60,7 @@ jobs:
           targets: wasm32-unknown-unknown
 
       - name: Cache Cargo registry
-        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
           path: |
             ~/.cargo/registry
@@ -139,7 +139,7 @@ jobs:
           targets: wasm32-unknown-unknown
 
       - name: Cache Cargo registry & shared target dir
-        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
           path: |
             ~/.cargo/registry

.github/workflows/deploy-futurenet.yml

@@ -38,7 +38,7 @@ jobs:
           soroban --version
 
       - name: Cache Cargo registry
-        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
           path: |
             ~/.cargo/registry

.github/workflows/frontend.yml

@@ -184,7 +184,7 @@ jobs:
 
       - name: Cache Playwright browsers
         id: playwright-cache
-        uses: actions/cache@0057852bfaa89a56745cba8c7296529d2fc39830 # v4
+        uses: actions/cache@55cc8345863c7cc4c66a329aec7e433d2d1c52a9 # v6.1.0
         with:
           path: ~/.cache/ms-playwright
           key: playwright-${{ runner.os }}-${{ hashFiles('Dechat/dex_with_fiat_frontend/pnpm-lock.yaml') }}