Bump workflow actions to Node 24 versions (erikdarlingdata#310)

Avoids GitHub's June 2, 2026 forced migration off Node 20:
- actions/checkout v4 -> v5
- actions/setup-dotnet v4 -> v5
- actions/upload-artifact v4 -> v6 (first major to default to Node 24)
- signpath/github-action-submit-signing-request v1 -> v2

Co-authored-by: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: erikdarlingdata

.github/workflows/check-version-bump.yml

@@ -10,7 +10,7 @@ jobs:
 
     steps:
       - name: Checkout PR branch
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
 
       - name: Get PR version
         id: pr
@@ -21,7 +21,7 @@ jobs:
           Write-Host "PR version: $version"
 
       - name: Checkout main
-        uses: actions/checkout@v4
+        uses: actions/checkout@v5
         with:
           ref: main
           path: main-branch

.github/workflows/ci.yml

@@ -11,10 +11,10 @@ jobs:
     runs-on: windows-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Setup .NET 8.0
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v5
         with:
           dotnet-version: 8.0.x
 

.github/workflows/deploy-web.yml

@@ -27,10 +27,10 @@ jobs:
       url: ${{ steps.deployment.outputs.page_url }}
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Setup .NET 8.0
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v5
         with:
           dotnet-version: 8.0.x
 

.github/workflows/nightly.yml

@@ -15,7 +15,7 @@ jobs:
     outputs:
       has_changes: ${{ steps.check.outputs.has_changes }}
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           ref: dev
           fetch-depth: 0
@@ -38,12 +38,12 @@ jobs:
     runs-on: windows-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
         with:
           ref: dev
 
       - name: Setup .NET 8.0
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v5
         with:
           dotnet-version: 8.0.x
 

.github/workflows/release.yml

@@ -16,7 +16,7 @@ jobs:
     runs-on: windows-latest
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v5
 
       - name: Get version
         id: version
@@ -46,7 +46,7 @@ jobs:
           gh release create "v${{ steps.version.outputs.VERSION }}" --title "v${{ steps.version.outputs.VERSION }}" --generate-notes --target main
 
       - name: Setup .NET 8.0
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v5
         with:
           dotnet-version: 8.0.x
 
@@ -78,14 +78,14 @@ jobs:
       - name: Upload Windows build for signing
         if: steps.signing.outputs.ENABLED == 'true'
         id: upload-unsigned
-        uses: actions/upload-artifact@v4
+        uses: actions/upload-artifact@v6
         with:
           name: App-unsigned
           path: publish/win-x64/
 
       - name: Sign Windows build
         if: steps.signing.outputs.ENABLED == 'true'
-        uses: signpath/github-action-submit-signing-request@v1
+        uses: signpath/github-action-submit-signing-request@v2
         with:
           api-token: '${{ secrets.SIGNPATH_API_TOKEN }}'
           organization-id: '7969f8b6-d946-4a74-9bac-a55856d8b8e0'