CHANGELOG.md: add entry for #973

CHANGELOG.md

@@ -19,6 +19,7 @@
 * Enhancement: Added support for new ELF UPX unpacking stubs (versions 3.93 - 3.96) ([#929](https://github.com/avast/retdec/pull/929)).
 * Enhancement: Improved YARA rules for detection of the SHA-512 algorithm ([#935](https://github.com/avast/retdec/pull/935)).
 * Enhancement: Improved PE Authenticode parsing ([#902](https://github.com/avast/retdec/pull/902), [#380](https://github.com/avast/retdec/issues/380)).
+* Fix: Fixed PE rich header analysis algorithm ([#973](https://github.com/avast/retdec/pull/973), [#960](https://github.com/avast/retdec/issues/960), [#965](https://github.com/avast/retdec/issues/965), [regression tests #91](https://github.com/avast/retdec-regression-tests/pull/91)).
 * Fix: Arithmetic shift is no longer converted to signed division as these operations provide different output with negative numbers. ([#724](https://github.com/avast/retdec/issues/724)).
 * Fix: Fixed infinite looping during the copy-propagation optimization in `llvmir2hll` ([#876](https://github.com/avast/retdec/pull/876)).
 * Fix: Fixed analyzed calling convention on MIPS architecture. Register F0 is used for floating point function return ([#656](https://github.com/avast/retdec/issues/656)).