Fix remaining placeholder channel names

- UCCebR16tXbv5Ykk9_WtCCug -> Christian T. Golden
- UC4YwC5zA9S_2EwthE27Xlew -> CMA

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

channels.yml

@@ -3,7 +3,7 @@
 
 channels:
   - id: UCCebR16tXbv5Ykk9_WtCCug
-    name: Channel UCCebR16tXbv
+    name: Christian T. Golden
     url: https://www.youtube.com/channel/UCCebR16tXbv5Ykk9_WtCCug/videos
   - id: UC6vg0HkKKlgsWk-3HfV-vnw
     name: A Quality Existence
@@ -267,5 +267,5 @@ channels:
     name: Wholly Unfocused
     url: https://www.youtube.com/channel/UCehAungJpAeC-F3R5FwvvCQ/videos
   - id: UC4YwC5zA9S_2EwthE27Xlew
-    name: Channel UC4YwC5zA9S
+    name: CMA
     url: https://www.youtube.com/channel/UC4YwC5zA9S_2EwthE27Xlew/videos