Update force vendor package build option in docs.

Author: nuclearsandwich

source/Contributing/Quality-Guide.rst

@@ -245,11 +245,11 @@ The code migration suggestions here are by no means complete - when writing (or
 
     * Passing compiler to CMake
 
-      * ``colcon build --cmake-args -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_CXX_FLAGS='-stdlib=libc++ -D_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS' -DFORCE_BUILD_POCO=ON -DFORCE_BUILD_TINYXML=ON --no-warn-unused-cli``
+      * ``colcon build --cmake-args -DCMAKE_C_COMPILER=clang -DCMAKE_CXX_COMPILER=clang++ -DCMAKE_CXX_FLAGS='-stdlib=libc++ -D_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS' -DFORCE_BUILD_VENDOR_PKG=ON --no-warn-unused-cli``
 
     * Overriding system compiler
 
-      * ``CC=clang CXX=clang++ colcon build --cmake-args -DCMAKE_CXX_FLAGS='-stdlib=libc++ -D_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS' -DFORCE_BUILD_POCO=ON -DFORCE_BUILD_TINYXML=ON --no-warn-unused-cli``
+      * ``CC=clang CXX=clang++ colcon build --cmake-args -DCMAKE_CXX_FLAGS='-stdlib=libc++ -D_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS' -DFORCE_BUILD_VENDOR_PKG=ON --no-warn-unused-cli``