SDL_mixer: cmake: fix samples install path

SDL Commits
1 
From 62b77c60cca82bf5790ad0a49305f825ef087fe6 Mon Sep 17 00:00:00 2001
From: Christoph Gohlke <[EMAIL REDACTED]>
Date: Wed, 23 Nov 2022 06:17:37 -0800
Subject: [PATCH] cmake: fix samples install path

---
 CMakeLists.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index de7b2120..002eec82 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -884,7 +884,7 @@ if(SDL2MIXER_SAMPLES)
 
         if(SDL2MIXER_SAMPLES_INSTALL)
             install(TARGETS ${prog}
-                RUNTIME DESTINATION "{CMAKE_INSTALL_BINDIR}"
+                RUNTIME DESTINATION "${CMAKE_INSTALL_BINDIR}"
             )
         endif()
     endforeach()