Fix URL to Boost.Build invocation section.

[SVN r57507]

more/getting_started/windows.html

@@ -365,7 +365,7 @@ bootstrap
 </pre>
 <p>The first command prepares the Boost.Build system for use. The second
 command invokes Boost.Build to build the separately-compiled Boost
-libraries. Please consult the <a class="reference external" href="http://www.boost.org/boost-build2/doc/html/bbv2/advanced/invocation.html">Boost.Build documentation</a> for a list
+libraries. Please consult the <a class="reference external" href="http://www.boost.org/boost-build2/doc/html/bbv2/overview/invocation.html">Boost.Build documentation</a> for a list
 of options that can be passed to <tt class="docutils literal"><span class="pre">bjam</span></tt>.</p>
 <div class="admonition-boost-cmake admonition">
 <p class="first admonition-title">Boost.CMake</p>

more/getting_started/windows.rst

@@ -215,7 +215,7 @@ command invokes Boost.Build to build the separately-compiled Boost
 libraries. Please consult the `Boost.Build documentation`__ for a list
 of options that can be passed to ``bjam``.
 
-__ http://www.boost.org/boost-build2/doc/html/bbv2/advanced/invocation.html
+__ http://www.boost.org/boost-build2/doc/html/bbv2/overview/invocation.html
 
 .. Admonition:: Boost.CMake