[Bug]: GitHub reporter needs an additional newline after test details for markdown to display correctly

[robertcoltheart]

Description

The GitHub reporter needs an additional new-line after the test details <details> section, otherwise subsequent H3 headings for other files will not display correctly.

Fix:
New line after writing </details>

Expected Behavior

Files H3 headings should render correctly in markdown

Actual Behavior

H3 headings after </details> do not render correctly in GitHub actions summary

Steps to Reproduce

1. Create multiple test assemblies
2. Create a failing test in one assembly
3. Observe github actions summary

TUnit Version

1.17.36

.NET Version

.net 9

Operating System

Windows

IDE / Test Runner

dotnet CLI (dotnet test / dotnet run)

Error Output / Stack Trace

Additional Context

No response

IDE-Specific Issue?

• I've confirmed this issue occurs when running via dotnet test or dotnet run, not just in my IDE