docs: make the halt error msg precise (#655)

Signed-off-by: Keming <[email protected]>

Author: kemingy

mosec/runtime.py

@@ -262,7 +262,7 @@ def halt(self):
                 continue
             # exited
             if ctr_exitcode:  # on error
-                logger.error("mosec service halted on error [%d]", ctr_exitcode)
+                logger.error("mosec service halted with signal [%d]", ctr_exitcode)
             else:
                 logger.info("mosec service halted normally [%d]", ctr_exitcode)
             break