doc: release-notes 3.2: STM32: Fix note on SDMMC driver update

STM32 SDMMC: DMA is actually available only for DMA-V1 compatible
devices.

Signed-off-by: Erwan Gouriou <[email protected]>

Author: erwango

doc/releases/release-notes-3.2.rst

@@ -773,7 +773,8 @@ Libraries / Subsystems
 
 * SD Subsystem
 
-  * SDMMC STM32: Added DMA support and now compatible with STM32L5 series.
+  * SDMMC STM32: Now compatible with STM32L5 series. Added DMA support for DMA-V1
+    compatible devices.
 
 * Settings