ci(deps): bump actions/cache from 5 to 6 (#226)

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.github/workflows/code-check.yml

@@ -22,7 +22,7 @@ jobs:
           node-version: '24'
           cache: 'npm'
 
-      - uses: actions/cache@v5
+      - uses: actions/cache@v6
         id: node-modules-cache
         with:
           path: |

.github/workflows/update-cache.yml

@@ -22,7 +22,7 @@ jobs:
           node-version: '24'
           cache: 'npm'
 
-      - uses: actions/cache@v5
+      - uses: actions/cache@v6
         id: node-modules-cache
         with:
           path: |