SDL: docs: Note the lowest supported Emscripten version.

SDL Commits
1 
From 1b895912a217e80aa8e2ac1c6377a018579d1c0a Mon Sep 17 00:00:00 2001
From: "Ryan C. Gordon" <[EMAIL REDACTED]>
Date: Fri, 30 Sep 2022 14:23:36 -0400
Subject: [PATCH] docs: Note the lowest supported Emscripten version.

Reference Issue #6304.
---
 docs/README-emscripten.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/docs/README-emscripten.md b/docs/README-emscripten.md
index b535cc60a125..7e9880b0879d 100644
--- a/docs/README-emscripten.md
+++ b/docs/README-emscripten.md
@@ -1,6 +1,10 @@
 Emscripten
 ================================================================================
 
+SDL currently requires at least Emscripten 2.0.32 to build. Newer versions
+are likely to work, as well.
+
+
 Build:
 
     $ mkdir build