Update _docs/concepts/client_library/execution_management/index.md

Co-authored-by: Ralph Lange <ralph-lange@users.noreply.github.com>

Author: JanStaschulat

_docs/concepts/client_library/execution_management/index.md

@@ -71,7 +71,7 @@ Given the goals for a Real-Time Executor and the limitations of the ROS 2 standa
 - to model requirements (like latencies, determinism in subsystems)
 - mapping of ROS 2 framework and operating system schedulers (semi-automated and optimized mapping is desired as well as generic, well-understood framework mechanisms)
 
-Our approach is to provide a Real-Time Executor on the rcl-layer (as described in section [Introduction to Client Library](../).) in C programming language .
+Our approach is to provide a real-time-capable Executor for the rcl+rclc layer (as described in section [Introduction to Client Library](../).) in the C programming language .
 
 As the first step, we propose the rclc Executor for the rcl-layer in C programming language with several new features to support real-time and deterministic execution: It supports 1.) user-defined static sequential execution, 2) conditional execution semantics, 3) multi-threaded execution with scheduling configuration, and 4) logical execution semantics (LET). Sequential execution refers to the runtime behavior, that all callbacks are executed in a pre-defined order independent of the arrival time of messages. Conditional execution is available with a trigger condition which enables typical processing patterns in robotics (which are analyzed in detail in section [Analysis of processing patterns](#analysis-of-processing-patterns). Configuration of scheduling parameters for multi-threaded application accomplishes prioritized execution. The logical execution time concept (LET) provides data synchronization for fixed periodic task scheduling of embedded applications.