better cache string for new option

Author: prince-chrismc

CMakeLists.txt

@@ -17,7 +17,7 @@ project(jwt-cpp)
 
 option(JWT_BUILD_EXAMPLES "Configure CMake to build examples (or not)" ON)
 option(JWT_BUILD_TESTS "Configure CMake to build tests (or not)" OFF)
-option(JWT_BUILD_DOCS "Configure CMake to build documentation (or not)" OFF)
+option(JWT_BUILD_DOCS "Adds a target for building the doxygen documentation" OFF)
 option(JWT_ENABLE_COVERAGE "Enable code coverage testing" OFF)
 option(JWT_ENABLE_FUZZING "Enable fuzz testing" OFF)