Clean up casing in CMake.

CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 852713b..550af45 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -738,8 +738,8 @@
     set(MINIZIP_CONFIG_CONTENT "@PACKAGE_INIT@\n")
     if(MINIZIP_DEP_PKG)
         string(APPEND MINIZIP_CONFIG_CONTENT "include(CMakeFindDependencyMacro)\n")
-        foreach(PKG_NAME ${MINIZIP_DEP_PKG})
-            string(APPEND MINIZIP_CONFIG_CONTENT "find_dependency(${PKG_NAME} REQUIRED)\n")
+        foreach(pkg_name ${MINIZIP_DEP_PKG})
+            string(APPEND MINIZIP_CONFIG_CONTENT "find_dependency(${pkg_name} REQUIRED)\n")
         endforeach()
     endif()
     string(APPEND MINIZIP_CONFIG_CONTENT "include(\"\${CMAKE_CURRENT_LIST_DIR}/${MINIZIP_TARGET}.cmake\")")