Broken link in the tutorial

[This](https://beta.boost.org/doc/libs/develop/libs/python/doc/html/tutorial/tutorial/hello.html) tutorial page has [this](https://beta.boost.org/doc/libs/develop/libs/example/tutorial/Jamroot) link broken.

Reference: [issue#1045](https://github.com/boostorg/boost/issues/1045). Thanks to @yurivict for pointing this out.