chore: Update CI and PR validation workflows to use .NET 10 and actions/checkout@v6

Author: janb84

.github/workflows/ci.yml

@@ -13,12 +13,12 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-latest, macos-latest]
-        dotnet-version: ['9.0.x']
+        dotnet-version: ['10.0.x']
       fail-fast: false
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Setup .NET
       uses: actions/setup-dotnet@v5
@@ -47,12 +47,12 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Setup .NET
       uses: actions/setup-dotnet@v5
       with:
-        dotnet-version: '9.0.x'
+        dotnet-version: '10.0.x'
 
     - name: Restore dependencies
       run: dotnet restore
@@ -66,12 +66,12 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Setup .NET
       uses: actions/setup-dotnet@v5
       with:
-        dotnet-version: '9.0.x'
+        dotnet-version: '10.0.x'
 
     - name: Restore dependencies
       run: dotnet restore
@@ -102,12 +102,12 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
 
     - name: Setup .NET
       uses: actions/setup-dotnet@v5
       with:
-        dotnet-version: '9.0.x'
+        dotnet-version: '10.0.x'
 
     - name: Build conformance handler
       run: |

.github/workflows/pr-validation.yml

@@ -11,14 +11,14 @@ jobs:
 
     steps:
     - name: Checkout code
-      uses: actions/checkout@v5
+      uses: actions/checkout@v6
       with:
         fetch-depth: 0
 
     - name: Setup .NET
       uses: actions/setup-dotnet@v5
       with:
-        dotnet-version: '9.0.x'
+        dotnet-version: '10.0.x'
 
     - name: Restore dependencies
       run: dotnet restore