dt-bindings: remoteproc: stm32-rproc: Typo fix

Fix "communnication" typo error.

Fixes: aca8f94 ("dt-bindings: remoteproc: stm32-rproc: add new mailbox channel for detach")
Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@foss.st.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
[Fixed title to read "stm32-rproc" instead of "st,stm32-rproc"]
Link: https://lore.kernel.org/r/20230403162423.3325968-1-arnaud.pouliquen@foss.st.com
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>

Author: arnopo

Documentation/devicetree/bindings/remoteproc/st,stm32-rproc.yaml

@@ -72,9 +72,9 @@ properties:
               ready for shutdown
       - description: |
           A channel (d) used by the local proc to notify the remote proc that it
-          has to stop interprocessor communnication.
+          has to stop interprocessor communication.
           Unidirectional channel:
-            - from local to remote, where ACK from the remote means that communnication
+            - from local to remote, where ACK from the remote means that communication
               as been stopped on the remote side.
     minItems: 1