fix(docs): IR -> Pipeline Spec (#11031)

Signed-off-by: Greg Sheremeta <gshereme@redhat.com>

Author: gregsheremeta

sdk/python/kfp/cli/dsl.py

@@ -1,4 +1,4 @@
-# Copyright 2022 The Kubeflow Authors
+# Copyright 2022-2024 The Kubeflow Authors
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -18,4 +18,4 @@
 
 @click.group(commands={'compile': compile_.compile_})
 def dsl():
-    """Command group for compiling DSL to IR."""
+    """Command group for compiling DSL to Pipeline Spec."""