Mark 5.0.6 as released (#26685)

Update changelog and emscripten-version.txt [ci skip]

Author: emscripten-bot

ChangeLog.md

@@ -18,8 +18,11 @@ to browse the changes between the tags.
 
 See docs/process.md for more on how version tagging works.
 
-5.0.6 (in development)
+5.0.7 (in development)
 ----------------------
+
+5.0.6 - 04/14/26
+----------------
 - The minimum version of node supported by the generated code was bumped from
   v12.22.0 to v18.3.0. (#26604)
 - The DETERMINISIC settings was marked as deprecated (#26653)

emscripten-version.txt

@@ -1 +1 @@
-5.0.6-git
+5.0.7-git