pySCG: add trailing newline to KNOWN_ISSUES.md

Fix markdown linting error MD047.

Signed-off-by: tommcd <[email protected]>

Author: tommcd

docs/Secure-Coding-Guide-for-Python/KNOWN_ISSUES.md

@@ -186,4 +186,5 @@ Python Code Issues:
 Total Files with Issues: 53
 
 For detailed output: uv run pytest tests/ -v
-For fix instructions: see tests/README.md
+For fix instructions: see tests/README.md
+