cherry-pick(#28267): docs(python): add ignoreCase to NotToHaveAttribu…

…te (#28273)

This PR cherry-picks the following commits:

- d7d1c80

Co-authored-by: github-actions <41898282+github-actions[bot]@users.noreply.github.com>

docs/src/api/class-locatorassertions.md

@@ -244,6 +244,12 @@ Attribute name.
 
 Expected attribute value.
 
+### option: LocatorAssertions.NotToHaveAttribute.ignoreCase
+* since: v1.40
+- `ignoreCase` <[boolean]>
+
+Whether to perform case-insensitive match. [`option: ignoreCase`] option takes precedence over the corresponding regular expression flag if specified.
+
 ### option: LocatorAssertions.NotToHaveAttribute.timeout = %%-csharp-java-python-assertions-timeout-%%
 * since: v1.18