manifest: hal_rpi_pico: Pull partial flash write changes from hal_rpi_pico

This commit links the hal_rpi_pico PR required for the flash driver.
west.yml is updated

Signed-off-by: Hanan Arshad <[email protected]>

Author: hanan619

west.yml

@@ -231,7 +231,7 @@ manifest:
         - hal
     - name: hal_rpi_pico
       path: modules/hal/rpi_pico
-      revision: 7b57b24588797e6e7bf18b6bda168e6b96374264
+      revision: 5a981c7c29e3846646549a1902183684f0147e1d
       groups:
         - hal
     - name: hal_silabs