Fix GetModifiedFiles to request all changes

Author: rothsandro

src/Cake.AzureDevOps.Tests/Fakes/FakeAllSetGitClientFactory.cs

@@ -130,7 +130,7 @@ protected override Mock<GitHttpClient> Setup(Mock<GitHttpClient> m)
                     It.IsAny<string>(),
                     It.IsAny<Guid>(),
                     true,
-                    null,
+                    int.MaxValue,
                     null,
                     It.IsAny<GitBaseVersionDescriptor>(),
                     It.IsAny<GitTargetVersionDescriptor>(),

src/Cake.AzureDevOps.Tests/Fakes/FakeNullForMethodsGitClientFactory.cs

@@ -15,7 +15,7 @@ protected override Mock<GitHttpClient> Setup(Mock<GitHttpClient> m)
             m.Setup(arg => arg.CreatePullRequestStatusAsync(It.IsAny<GitPullRequestStatus>(), It.IsAny<Guid>(), It.IsAny<int>(), It.IsAny<object>(), It.IsAny<CancellationToken>()))
              .ReturnsAsync(() => null);
 
-            m.Setup(arg => arg.GetCommitDiffsAsync(It.IsAny<string>(), It.IsAny<Guid>(), true, null, null, It.IsAny<GitBaseVersionDescriptor>(), It.IsAny<GitTargetVersionDescriptor>(), null, CancellationToken.None))
+            m.Setup(arg => arg.GetCommitDiffsAsync(It.IsAny<string>(), It.IsAny<Guid>(), true, int.MaxValue, null, It.IsAny<GitBaseVersionDescriptor>(), It.IsAny<GitTargetVersionDescriptor>(), null, CancellationToken.None))
              .ReturnsAsync(() => new GitCommitDiffs { ChangeCounts = [], Changes = [] });
 
             m.Setup(arg => arg.UpdateThreadAsync(It.IsAny<GitPullRequestCommentThread>(), It.IsAny<Guid>(), It.IsAny<int>(), It.IsAny<int>(), null, CancellationToken.None))

src/Cake.AzureDevOps/Repos/PullRequest/AzureDevOpsPullRequest.cs

@@ -407,7 +407,7 @@ public IEnumerable<FilePath> GetModifiedFiles()
                         this.ProjectName,
                         this.RepositoryId,
                         true, // bool? diffCommonCommit
-                        null, // int? top
+                        int.MaxValue, // int? top
                         null, // int? skip
                         baseVersionDescriptor,
                         targetVersionDescriptor)