Solution (#3915): Dangerous Workflow: some user input are not being detected as unt

[TFGSUMIT]

This PR addresses the issue of untrusted user input not being detected in the contains_untrusted_context_pattern function. The function now correctly identifies variables containing untrusted context patterns, such as GitHub event context details that may be attacker-controlled.

Changes made:

• Updated the contains_untrusted_context_pattern function to include additional GitHub event context details that may be attacker-controlled.
• Added new test cases to cover these scenarios.
• Updated the test cases to cover the new scenarios.

Testing instructions:

• Run the test cases using python -m unittest checks.dangerous_workflow_test.
• Verify that the function correctly identifies variables containing untrusted context patterns.
• Verify that the function returns False for variables not containing untrusted context patterns.