COMPMID-1934: Doxygen online documentation errors on Firefox

Change-Id: I669d57380d95760399cd7fd28c58d0e636d706dd
Signed-off-by: Manuel Bottini <manuel.bottini@arm.com>
Reviewed-on: https://review.mlplatform.org/647
Tested-by: Arm Jenkins <bsgcomp@arm.com>
Reviewed-by: Pablo Marquez <pablo.tello@arm.com>
diff --git a/arm_compute/core/Types.h b/arm_compute/core/Types.h
index 9fbd0ef..1ce44ee 100644
--- a/arm_compute/core/Types.h
+++ b/arm_compute/core/Types.h
@@ -1455,7 +1455,7 @@
         RELU,            /**< Rectifier ( \f$ f(x) = max(0,x) \f$ ) */
         BOUNDED_RELU,    /**< Upper Bounded Rectifier ( \f$ f(x) = min(a, max(0,x)) \f$ ) */
         LU_BOUNDED_RELU, /**< Lower and Upper Bounded Rectifier ( \f$ f(x) = min(a, max(b,x)) \f$ ) */
-        LEAKY_RELU,      /**< Leaky Rectifier ( \f$ f(x)= log(1+e^x) \f$ ) */
+        LEAKY_RELU,      /**< Leaky Rectifier ( \f$ f(x) = \begin{cases}  \alpha x & \quad \text{if } x \text{ < 0}\\  x & \quad \text{if } x \geq \text{ 0 } \end{cases} \f$ ) */
         SOFT_RELU,       /**< Soft Rectifier ( \f$ f(x)= log(1+e^x) \f$ ) */
         ABS,             /**< Absolute ( \f$ f(x)= |x| \f$ ) */
         SQUARE,          /**< Square ( \f$ f(x)= x^2 \f$ )*/