chore: update CHANGELOG for PR #2379

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: naor-starkware

CHANGELOG.md

@@ -15,6 +15,7 @@ Both branches support Stwo prover opcodes (Blake2s, QM31) since v2.0.0.
 * refactor: add `function_runner` feature flag and `CairoFunctionRunner` type alias for `CairoRunner` [#2377](https://github.com/starkware-libs/cairo-vm/pull/2377)
 * feat: add `test_helpers` module (`error_utils`, `test_utils`) with `assert_mr_eq!`, `load_cairo_program!` macros and `expect_*` error checkers, behind `function_runner` feature flag [#2378](https://github.com/starkware-libs/cairo-vm/pull/2378)
 * feat(makefile,ci): add `cairo_test_suite_programs` Makefile target and CI integration to compile Cairo test suite programs before running tests [#2380](https://github.com/starkware-libs/cairo-vm/pull/2380)
+* feat: add math Cairo test suite under `vm/src/tests/cairo_test_suite` using the `function_runner` feature flag [#2379](https://github.com/starkware-libs/cairo-vm/pull/2379)
 
 * Add Stwo cairo runner API [#2351](https://github.com/lambdaclass/cairo-vm/pull/2351)