[Bug] Typo in assertion property name: "Asserion.test_strings" missing 't'

### Expected behavior

There is a spelling error in the property name tag for the assertion component. The attribute value uses Asserion.test_strings instead of Assertion.test_strings (missing the letter t).
Actual:
``
Expected:
``
Environment
JMeter Version: 5.0

This typo causes property name inconsistency and may lead to parsing issues or unexpected behavior when evaluating test assertions.

### Actual behavior

_No response_

### Steps to reproduce the problem

Steps to Reproduce
1.Open Apache JMeter 5.0 and create or load a test plan with the assertion component.
2.Run a load test utilizing the custom/third-party plugin.
3.Save the test plan (.jmx) or inspect the underlying assertion component XML code.
4.Locate the collection property definition for the test strings.
5.Observe that the property name attribute is mispelled as instead of Assertion.test_strings.

### JMeter Version

5.0

### Java Version

_No response_

### OS Version

_No response_

Search the JMeter source for the exact string "Asserion.test_strings" and inspect the assertion component property definition. Change the property name to "Assertion.test_strings", then verify that the saved assertion component uses the corrected spelling.

Written by the indexing model from the issue text.