Add notice annotation for the git unsafe directory error.

src/Runner.Worker/Handlers/OutputManager.cs

@@ -154,6 +154,12 @@ namespace GitHub.Runner.Worker.Handlers
             if (line.Contains("fatal: unsafe repository", StringComparison.OrdinalIgnoreCase))
             {
                 _executionContext.StepTelemetry.ErrorMessages.Add(line);
+                var gitUnsafeDirNotice = new DTWebApi.Issue
+                {
+                    Message = $"You may experience error caused by a recently git safe directory enforcement. For more information see: https://github.blog/changelog/xxx",
+                    Type = DTWebApi.IssueType.Notice,
+                };
+                _executionContext.AddIssue(gitUnsafeDirNotice);
             }
 
             // Regular output

src/Test/L0/Worker/OutputManagerL0.cs

@@ -947,6 +947,7 @@ namespace GitHub.Runner.Common.Tests.Worker
             {
                 Process("fatal: unsafe repository ('/github/workspace' is owned by someone else)");
                 Assert.Contains("fatal: unsafe repository ('/github/workspace' is owned by someone else)", _executionContext.Object.StepTelemetry.ErrorMessages);
+                Assert.Contains(_issues, x => x.Item1.Type == DTWebApi.IssueType.Notice && x.Item1.Message.Contains("You may experience error caused by a recently git safe directory enforcement"));
             }
         }