[cli] fix typo in commissioner/joiner docs (#5953)

diff --git a/src/cli/cli_commissioner.hpp b/src/cli/cli_commissioner.hpp
index fffa8df..423c470 100644
--- a/src/cli/cli_commissioner.hpp
+++ b/src/cli/cli_commissioner.hpp
@@ -48,7 +48,7 @@
 class Interpreter;
 
 /**
- * This class implements the CLI CoAP Secure server and client.
+ * This class implements the Commissioner CLI interpreter.
  *
  */
 class Commissioner
diff --git a/src/cli/cli_joiner.hpp b/src/cli/cli_joiner.hpp
index 9944c16..f4fad88 100644
--- a/src/cli/cli_joiner.hpp
+++ b/src/cli/cli_joiner.hpp
@@ -48,7 +48,7 @@
 class Interpreter;
 
 /**
- * This class implements the CLI CoAP Secure server and client.
+ * This class implements the Joiner CLI interpreter.
  *
  */
 class Joiner