Don't indent remarks

When remarks get indented by 4 spaces, they're rendered as code blocks. For example, [this PR](https://github.com/dotnet/dotnet-api-docs/pull/7054/files) introduced indentation that caused the remarks to render as code blocks. A customer fixed that in https://github.com/dotnet/dotnet-api-docs/pull/7104. The /// for the remarks is [here](https://github.com/dotnet/runtime/blob/36b6247cc7743dda997e9d671175ddc2b3e030ba/src/coreclr/System.Private.CoreLib/src/System/Runtime/DependentHandle.cs#L15) - perhaps the `` tags are causing the indentation.