Mark 4.0.7 as released (#24113)

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.
 
-4.0.7 (in development)
+4.0.8 (in development)
 ----------------------
+
+4.0.7 - 04/15/25
+----------------
 - Added experimental support for Wasm ESM integration with
   `-sWASM_ESM_INTEGRATION`. This is currently only supported in node behind a
   flag and not in any browsers. (#23985)

emscripten-version.txt

@@ -1 +1 @@
-4.0.7-git
+4.0.8-git