Update cmake/stm32_gcc.cmake

cmake/stm32_gcc.cmake

@@ -1,5 +1,6 @@
 if(${CMAKE_VERSION} VERSION_LESS "3.16.0") 
-    message(WARNING "Current CMake verision is ${CMAKE_VERSION}. stm32-cmake requires CMake 3.16 or greater")
+    message(WARNING "Current CMake version is ${CMAKE_VERSION}. stm32-cmake requires CMake 3.16 or greater")
+
 endif()
 
 get_filename_component(STM32_CMAKE_DIR ${CMAKE_CURRENT_LIST_FILE} DIRECTORY)