ci: update more github actions

Signed-off-by: Francesco Gazzetta <[email protected]>

Author: fgaz

.github/workflows/main.yml

@@ -13,11 +13,11 @@ jobs:
     steps:
     - name: Checkout files
       id:   checkout-files
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: Check the cached arm-none-eabi-gcc compiler
       id:   cache-toolchain
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       env:
         cache-name: cache-toolchain-10-2020-q4
       with:

.github/workflows/sim.yml

@@ -13,11 +13,11 @@ jobs:
     steps:
     - name: Checkout files
       id:   checkout-files
-      uses: actions/checkout@v2
+      uses: actions/checkout@v4
 
     - name: Check the cached python downloads
       id:   cache-modules
-      uses: actions/cache@v2
+      uses: actions/cache@v4
       env:
         cache-name: cache-toolchain
       with: