Mark 3.1.54 as released (#21358)

Author: sbc100

ChangeLog.md

@@ -18,8 +18,11 @@ to browse the changes between the tags.
 
 See docs/process.md for more on how version tagging works.
 
-3.1.54 (in development)
+3.1.55 (in development)
 -----------------------
+
+3.1.54 - 02/15/24
+-----------------
 - The `DEMANGLE_SUPPORT` setting and the associated `demangle` function are
   now deprecated since Wasm stack traces always contain demangled symbols these
   days. (#21346)

emscripten-version.txt

@@ -1 +1 @@
-3.1.54-git
+3.1.55-git