Replace "Http/2" with "HTTP" in the QUICHE README.md

PiperOrigin-RevId: 435677823
diff --git a/README.md b/README.md
index 335c0d8..c50157b 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # QUICHE
 
-QUICHE stands for QUIC, Http/2, Etc. It is Google's production-ready
+QUICHE stands for QUIC, Http, Etc. It is Google's production-ready
 implementation of QUIC, HTTP/2, HTTP/3, and related protocols and tools. It
 powers Google's servers, Chromium, Envoy, and other projects. It is actively
 developed and maintained.