Rename QS8 generator templates

PiperOrigin-RevId: 334260510
diff --git a/src/qs8-igemm/gen/2x4c8-minmax-sse2-ld128.c b/src/qs8-igemm/gen/2x4c8-minmax-sse2-ld128.c
index 8730e85..906861e 100644
--- a/src/qs8-igemm/gen/2x4c8-minmax-sse2-ld128.c
+++ b/src/qs8-igemm/gen/2x4c8-minmax-sse2-ld128.c
@@ -1,5 +1,5 @@
 // Auto-generated file. Do not edit!
-//   Template: src/qs8-igemm/MRx4c8-minmax-sse.c.in
+//   Template: src/qs8-igemm/MRx4c8-sse.c.in
 //   Generator: tools/xngen
 //
 // Copyright 2020 Google LLC