update to gh cache actions v4

Author: lucasgelfond

Diff for: .github/workflows/CI.yml

@@ -21,7 +21,7 @@ jobs:
         uses: docker/setup-buildx-action@v2
       - name: Cache build
         id: cache-build
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: build-cache-st
           key: build-cache-st-v1-${{ hashFiles('Dockerfile', 'Makefile', 'build/*') }}
@@ -44,7 +44,7 @@ jobs:
         uses: docker/setup-buildx-action@v2
       - name: Cache build
         id: cache-build
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: build-cache-mt
           key: build-cache-mt-v1-${{ hashFiles('Dockerfile', 'Makefile', 'build/*') }}
@@ -81,7 +81,7 @@ jobs:
           node-version: 18.x
       - name: Cache dependencies
         id: cache-dependencies
-        uses: actions/cache@v2
+        uses: actions/cache@v4
         with:
           path: node_modules
           key: node-modules-${{ hashFiles('package-lock.json') }}