upgrade cache action

https://github.com/actions/cache?tab=readme-ov-file#%EF%B8%8F-important-changes

Author: chris48s

.github/workflows/validate.yaml

@@ -14,7 +14,7 @@ jobs:
       - uses: actions/setup-node@v2
         with:
           node-version: "*"
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: |
             node_modules
@@ -33,7 +33,7 @@ jobs:
       - uses: actions/setup-node@v2
         with:
           node-version: "*"
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: |
             node_modules
@@ -55,7 +55,7 @@ jobs:
       - uses: actions/setup-node@v2
         with:
           node-version: "*"
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: |
             node_modules
@@ -75,7 +75,7 @@ jobs:
       - uses: actions/setup-node@v2
         with:
           node-version: "*"
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           path: |
             node_modules