Update CHANGELOG.md

Author: jkwoon-NI

CHANGELOG.md

@@ -42,7 +42,16 @@ All notable changes to this project will be documented in this file.
     * #### Removed
 * ### `nidcpower` (NI-DCPower)
     * #### Added
-    * #### Changed
+        * API parity with NI-DCPower 2025 Q1.
+            * Enum value added:
+                * `INHIBITED` added to enum `OutputStates`.
+    * #### Changed
+        * Function documentation updated:
+            * `query_output_state`
+                * Updated enum descriptions for the `output_state` arg.
+        * Attribute documentation updated:
+            * `measure_buffer_size`, `measure_complete_event_delay`, and `source_delay` descriptions updated to specify `PXIe-4150/4151` instead of `PXIe-4151`.
+            * Updated `merged_channels` description wording.
     * #### Removed
 * ### `nidigital` (NI-Digital Pattern Driver)
     * #### Added