(deps): Bump LibGit2Sharp from 0.30.0 to 0.31.0 in /src

Bumps [LibGit2Sharp](https://github.com/libgit2/libgit2sharp) from 0.30.0 to 0.31.0.
- [Release notes](https://github.com/libgit2/libgit2sharp/releases)
- [Changelog](https://github.com/libgit2/libgit2sharp/blob/master/CHANGES.md)
- [Commits](libgit2/libgit2sharp@0.30.0...0.31.0)

---
updated-dependencies:
- dependency-name: LibGit2Sharp
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

src/Directory.Packages.props

@@ -4,7 +4,7 @@
   </PropertyGroup>
   <ItemGroup>
     <!-- common packages -->
-    <PackageVersion Include="LibGit2Sharp" Version="0.30.0" />
+    <PackageVersion Include="LibGit2Sharp" Version="0.31.0" />
     <PackageVersion Include="Microsoft.CodeAnalysis.Analyzers" Version="3.11.0" />
     <PackageVersion Include="Microsoft.CodeAnalysis.Common" Version="4.11.0" />
     <PackageVersion Include="Microsoft.CodeAnalysis.CSharp" Version="4.11.0" />

src/GitVersion.App.Tests/ExecCmdLineArgumentTest.cs

@@ -56,7 +56,7 @@ public void WorkingDirectoryWithoutGitFolderFailsWithInformativeMessage()
 
         result.ExitCode.ShouldNotBe(0);
         result.Output.ShouldNotBeNull();
-        result.Output.ShouldContain("Cannot find the .git directory");
+        result.Output.ShouldContain("failed to resolve path");
     }
 
     [TestCase(" -help")]

src/GitVersion.LibGit2Sharp/Git/GitRepositoryInfo.cs

@@ -66,10 +66,9 @@ public GitRepositoryInfo(IOptions<GitVersionOptions> options)
             : Repository.Discover(gitVersionOptions.WorkingDirectory);
 
         gitDirectory = gitDirectory?.TrimEnd('/', '\\');
-        if (gitDirectory.IsNullOrEmpty())
-            throw new DirectoryNotFoundException("Cannot find the .git directory");
+        EnsureGitDirectory(gitDirectory);
 
-        var directoryInfo = Directory.GetParent(gitDirectory) ?? throw new DirectoryNotFoundException("Cannot find the .git directory");
+        var directoryInfo = Directory.GetParent(gitDirectory) ?? throw new DirectoryNotFoundException();
         return gitDirectory.Contains(PathHelper.Combine(".git", "worktrees"))
             ? Directory.GetParent(directoryInfo.FullName)?.FullName
             : gitDirectory;
@@ -84,8 +83,7 @@ private string GetProjectRootDirectory()
 
         var gitDirectory = Repository.Discover(gitVersionOptions.WorkingDirectory);
 
-        if (gitDirectory.IsNullOrEmpty())
-            throw new DirectoryNotFoundException("Cannot find the .git directory");
+        EnsureGitDirectory(gitDirectory);
 
         return new Repository(gitDirectory).Info.WorkingDirectory;
     }
@@ -110,4 +108,10 @@ private static bool GitRepoHasMatchingRemote(string possiblePath, string targetU
             return false;
         }
     }
+
+    private static void EnsureGitDirectory(string? gitDirectory)
+    {
+        if (gitDirectory.IsNullOrWhiteSpace())
+            throw new DirectoryNotFoundException("Cannot find the .git directory");
+    }
 }