[HAL][GENERIC] Update of HAL_GetTickFreq() brief

diff --git a/Src/stm32g0xx_hal.c b/Src/stm32g0xx_hal.c
index 7e4ffcf..88b544c 100644
--- a/Src/stm32g0xx_hal.c
+++ b/Src/stm32g0xx_hal.c

@@ -362,7 +362,8 @@
 
 /**
   * @brief return tick frequency.
-  * @retval tick period in Hz
+  * @retval Tick frequency.
+  *         Value of @ref HAL_TickFreqTypeDef.
   */
 HAL_TickFreqTypeDef HAL_GetTickFreq(void)
 {