Upgrade GitHub actions (#333)

Author: hpoettker

.github/actions/windows_actions/action.yml

@@ -5,23 +5,23 @@ runs:
   using: "composite"
   steps:
     - name: Checkout libiconv
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         repository: kiyolee/libiconv-win-build
         ref: dff1030d222ba934e0f4a9cdab9c34134f072f68 # v1.18
         path: libiconv-win-build
         persist-credentials: false
 
     - name: Checkout zlib
-      uses: actions/checkout@v4
+      uses: actions/checkout@v6
       with:
         repository: kiyolee/zlib-win-build
         ref: 30623e05e64fe4b97f2073ddaf8d3ba0e99d7249
         path: zlib-win-build
         persist-credentials: false
 
     - name: Add msbuild to PATH
-      uses: microsoft/setup-msbuild@v2
+      uses: microsoft/setup-msbuild@v3
 
     - name: Build libiconv
       run: |

.github/workflows/ci.yml

@@ -13,10 +13,10 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
 
       - name: Set up Python
-        uses: actions/setup-python@v5
+        uses: actions/setup-python@v6
         with:
           python-version: "3.13"