Fix: Change PUBLIC to INTERFACE for interface library in error message

CMakeLists.txt

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 9143337..86471b7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,7 +25,7 @@
             "    INTERFACE\n"
             "      include) # The config file directory\n"
             "  target_compile_definitions(freertos_config\n"
-            "    PUBLIC\n"
+            "    INTERFACE\n"
             "    projCOVERAGE_TEST=0)\n")
     else()
         message(WARNING " Using deprecated 'FREERTOS_CONFIG_FILE_DIRECTORY' - please update your project CMakeLists.txt file:\n"
@@ -34,7 +34,7 @@
             "    INTERFACE\n"
             "      include) # The config file directory\n"
             "  target_compile_definitions(freertos_config\n"
-            "    PUBLIC\n"
+            "    INTERFACE\n"
             "    projCOVERAGE_TEST=0)\n")
     endif()
 endif()