[cmake] fix cpp-jwt build fail even if ENABLE_UPDATE_CHECKER is defined but NOT ENABLE_WEB_SERVICE (#2881)

Signed-off-by: lizzie <lizzie@eden-emu.dev>
Reviewed-on: https://git.eden-emu.dev/eden-emu/eden/pulls/2881
Co-authored-by: lizzie <lizzie@eden-emu.dev>
Co-committed-by: lizzie <lizzie@eden-emu.dev>

externals/CMakeLists.txt

@@ -219,7 +219,7 @@ if (ENABLE_WEB_SERVICE OR ENABLE_UPDATE_CHECKER)
 endif()
 
 # cpp-jwt
-if (ENABLE_WEB_SERVICE)
+if (ENABLE_WEB_SERVICE OR ENABLE_UPDATE_CHECKER)
     AddJsonPackage(cpp-jwt)
 endif()