Update .agent/workflows/build_and_validate.md

indent fenced code block

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

Author: 2 people

.agent/workflows/build_and_validate.md

@@ -4,16 +4,19 @@ description: Build and validate new C code features
 
 This workflow describes the process for building and validating any new C code features in the SOF repository.
 
-**Note:** The QEMU build targets must be used for both building and testing.
+**Note:** The QEMU build targets must be used for both building and testing. The user requires the build must be error and warning free and the ztests must all pass.
 
+// turbo-all
 1. Build the new C code feature using the `xtensa-build-zephyr.py` script.
-```bash
-./scripts/xtensa-build-zephyr.py
-```
+    ```bash
+    source ../.venv/bin/activate
+    ./scripts/xtensa-build-zephyr.py qemu_xtensa
+    ```
 
 2. Validate the feature with a ztest run using the `sof-qemu-run.sh` script.
-```bash
-./scripts/sof-qemu-run.sh
-```
+    ```bash
+    source ../.venv/bin/activate
+    ./scripts/sof-qemu-run.sh build-qemu_xtensa
+    ```
 
-3. Ensure that all new features and functions have appropriate Doxygen comments and that the Doxygen documentation builds without errors or warnings.
+3. Ensure that all new features and functions have appropriate Doxygen comments and that the Doxygen documentation builds without errors or warnings.