[C#] Filter out complex block warning in CodeQL

Author: mjpt777

.github/codeql/codeql-config.yml

@@ -12,7 +12,9 @@ query-filters:
  id: java/uncaught-number-format-exception
  - exclude:
  id: cs/useless-assignment-to-local
+ - exclude:
+ id: cs/complex-block
  - exclude:
  id: cpp/trivial-switch
  - exclude:
- id: cpp/poorly-documented-function
+ id: cpp/poorly-documented-function