Bump NGitLab from 6.39.0 to 6.51.1 in /src#601

gep13 merged 1 commit intodevelopGitTools/GitReleaseManager:developfrom

dependabot/nuget/src/NGitLab-6.51.1GitTools/GitReleaseManager:dependabot/nuget/src/NGitLab-6.51.1Copy head branch name to clipboard