Update jetson.md

docs/cn/build_and_install/jetson.md

@@ -16,6 +16,7 @@ cd FastDeploy
 mkdir build && cd build
 cmake .. -DBUILD_ON_JETSON=ON \
          -DENABLE_VISION=ON \
+         -DENABLE_TEXT=ON
          -DCMAKE_INSTALL_PREFIX=${PWD}/installed_fastdeploy
 make -j8
 make install
@@ -39,6 +40,7 @@ git clone https://github.com/PaddlePaddle/FastDeploy.git
 cd FastDeploy/python
 export BUILD_ON_JETSON=ON
 export ENABLE_VISION=ON
+export ENABLE_TEXT=ON
 
 python setup.py build
 python setup.py bdist_wheel