Upgrade deprecated GitHub Actions to v4

F-876

.github/workflows/haproxy.yml

@@ -72,7 +72,7 @@ jobs:
 
     - name: Download haproxy if needed
       if: steps.cache-haproxy.outputs.cache-hit != 'true'
-      uses: actions/checkout@v3
+      uses: actions/checkout@v4
       with:
         repository: haproxy/haproxy
         ref: ${{matrix.haproxy_ref}}

.github/workflows/msys2.yml

@@ -20,7 +20,7 @@ jobs:
       run:
         shell: msys2 {0}
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: msys2/setup-msys2@v2
         with:
           msystem: msys

.github/workflows/threadx.yml

@@ -15,7 +15,7 @@ jobs:
     steps:
     - name: Cache NetXDuo bundle
       id: cache-netxduo
-      uses: actions/cache@v3
+      uses: actions/cache@v4
       with:
         path: ./v6.4.3_rel.tar.gz
         key: netxduo-bundle-v6.4.3_rel