Update src/ipc/ipc3/readme.md

Typo: “Device Loopup” should be “Device Lookup”.

Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
Signed-off-by: Liam Girdwood <lgirdwood@gmail.com>

Author: lgirdwood

src/ipc/ipc3/readme.md

@@ -48,7 +48,7 @@ graph TD
 Triggering is strictly hierarchical via IPC3. It expects pipelines built and components fully parsed prior to active streaming commands.
 
 1. **Validation**: The IPC fetches the host component ID.
-2. **Device Loopup**: It searches the components list (`ipc_get_comp_dev`) for the PCM device matching the pipeline.
+2. **Device Lookup**: It searches the components list (`ipc_get_comp_dev`) for the PCM device matching the pipeline.
 3. **Execution**: If valid, the pipeline graph is crawled recursively and its state altered via `pipeline_trigger`.
 
 ```mermaid