Bump Microsoft.Owin from 3.0.1 to 4.2.2 in /MarkdownFileHandler#13

dependabot[bot] wants to merge 1 commit intomasterOneDrive/o365-markdown-file-handler-v2:masterfrom

dependabot/nuget/MarkdownFileHandler/Microsoft.Owin-4.2.2OneDrive/o365-markdown-file-handler-v2:dependabot/nuget/MarkdownFileHandler/Microsoft.Owin-4.2.2Copy head branch name to clipboard