deps: bump NuGet and GitHub Actions dependencies

Applies the pending Dependabot updates in a single verified change:

NuGet (Directory.Packages.props):
- LibGit2Sharp 0.31.0 -> 0.32.0 (security release; libgit2 v1.8.6) (#22)
- AngleSharp 1.5.2 -> 1.6.0 (#21)

GitHub Actions:
- actions/checkout v4 -> v7 (#18)
- actions/setup-dotnet v4 -> v6 (#17)
- actions/deploy-pages v4 -> v5 (#20)
- softprops/action-gh-release v2 -> v3 (#19)

Verified locally: restore, Release build, dotnet format check, and the full
test suite (352 passed) all green with the bumped package versions.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: 2 people

.github/workflows/action-selftest.yml

@@ -18,7 +18,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@v7
         with:
           fetch-depth: 0
 

.github/workflows/ci.yml

@@ -10,10 +10,10 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Setup .NET
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v6
         with:
           global-json-file: global.json
 

.github/workflows/docker.yml

@@ -18,7 +18,7 @@ jobs:
   image:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Log in to GHCR
         uses: docker/login-action@v4

.github/workflows/docs.yml

@@ -18,12 +18,12 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
         with:
           fetch-depth: 0 # git-revision-date needs full history
 
       - name: Setup .NET
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v6
         with:
           global-json-file: global.json
 
@@ -46,4 +46,4 @@ jobs:
     steps:
       - name: Deploy to GitHub Pages
         id: deployment
-        uses: actions/deploy-pages@v4
+        uses: actions/deploy-pages@v5

.github/workflows/packages.yml

@@ -19,10 +19,10 @@ jobs:
   packages:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Setup .NET
-        uses: actions/setup-dotnet@v4
+        uses: actions/setup-dotnet@v6
         with:
           global-json-file: global.json
 
@@ -87,6 +87,6 @@ jobs:
 
       - name: Attach to release
         if: github.ref_type == 'tag'
-        uses: softprops/action-gh-release@v2
+        uses: softprops/action-gh-release@v3
         with:
           files: out/*

Directory.Packages.props

@@ -16,8 +16,8 @@
     <PackageVersion Include="Microsoft.Extensions.Configuration.EnvironmentVariables" Version="10.0.10" />
     <PackageVersion Include="Microsoft.Extensions.Options" Version="10.0.10" />
     <PackageVersion Include="Microsoft.AspNetCore.WebSockets" Version="2.3.0" />
-    <PackageVersion Include="AngleSharp" Version="1.5.2" />
-    <PackageVersion Include="LibGit2Sharp" Version="0.31.0" />
+    <PackageVersion Include="AngleSharp" Version="1.6.0" />
+    <PackageVersion Include="LibGit2Sharp" Version="0.32.0" />
     <!-- Pinned to the 3.x line on purpose: ImageSharp 4.0 switched to the Six Labors Split
          License and fails the build without a registered license key (sixlabors.lic). Netdocs is
          a zero-config OSS tool distributed to users, so we stay on the Apache-2.0 3.1.x releases. -->