Fix GH workflow syntax error

Author: mattia-moffa

.github/workflows/test-build.yml

@@ -53,7 +53,7 @@ jobs:
           inputs.config-file == './config/examples/stm32u5.config' ||
           inputs.config-file == './config/examples/stm32u5-wolfcrypt-tz.config' ||
           inputs.config-file == './config/examples/stm32u5-nonsecure-dualbank.config' ||
-          inputs.config-file == './config/examples/stm32n6.config'
+          inputs.config-file == './config/examples/stm32n6.config' ||
           inputs.config-file == './config/examples/stm32n6-tz.config'
         run: |
           make distclean