Doc: Fixed the logging mode of pipe to be ascii_pipe
diff --git a/doc/admin-guide/logging/examples.en.rst b/doc/admin-guide/logging/examples.en.rst
index c9b598e..84b919c 100644
--- a/doc/admin-guide/logging/examples.en.rst
+++ b/doc/admin-guide/logging/examples.en.rst
@@ -293,7 +293,7 @@
      accept: cqup MATCH "/nightmare/scenario/dont/touch"
 
    logs:
-   - mode: pipe
+   - mode: ascii_pipe
      format: canaryformat
      filters:
      - canaryfilter
@@ -310,7 +310,7 @@
 .. code:: yaml
 
    logs:
-   - mode: pipe
+   - mode: ascii_pipe
      format: canaryformat
      filters:
      - canaryfilter