Doc: fix link to the QDoc Manual
Doc: fix link to the QDoc Manual

In the Writing Documentation topic of the Extending Qt Creator
Manual.

Change-Id: Iebe960cc878469fb34951a196558d8a7cb22f11f
Reviewed-by: Jerome Pasion <c10995d24f6b454503389e8d00d837aef038985d@digia.com>

colede/qtcreator,omniacreator/qtcreator,colede/qtcreator,farseerri/git_code,amyvmiwei/qt-creator,omniacreator/qtcreator,maui-packages/qt-creator,darksylinc/qt-creator,danimo/qt-creator,martyone/sailfish-qtcreator,richardmg/qtcreator,maui-packages/qt-creator,danimo/qt-creator,farseerri/git_code,richardmg/qtcreator,martyone/sailfish-qtcreator,xianian/qt-creator,darksylinc/qt-creator,danimo/qt-creator,kuba1/qtcreator,amyvmiwei/qt-creator,danimo/qt-creator,omniacreator/qtcreator,xianian/qt-creator,richardmg/qtcreator,colede/qtcreator,martyone/sailfish-qtcreator,maui-packages/qt-creator,darksylinc/qt-creator,AltarBeastiful/qt-creator,martyone/sailfish-qtcreator,danimo/qt-creator,Distrotech/qtcreator,richardmg/qtcreator,omniacreator/qtcreator,AltarBeastiful/qt-creator,amyvmiwei/qt-creator,omniacreator/qtcreator,amyvmiwei/qt-creator,colede/qtcreator,xianian/qt-creator,xianian/qt-creator,maui-packages/qt-creator,omniacreator/qtcreator,martyone/sailfish-qtcreator,kuba1/qtcreator,amyvmiwei/qt-creator,kuba1/qtcreator,danimo/qt-creator,Distrotech/qtcreator,farseerri/git_code,danimo/qt-creator,amyvmiwei/qt-creator,maui-packages/qt-creator,darksylinc/qt-creator,colede/qtcreator,danimo/qt-creator,kuba1/qtcreator,AltarBeastiful/qt-creator,xianian/qt-creator,farseerri/git_code,AltarBeastiful/qt-creator,farseerri/git_code,darksylinc/qt-creator,darksylinc/qt-creator,martyone/sailfish-qtcreator,kuba1/qtcreator,martyone/sailfish-qtcreator,omniacreator/qtcreator,AltarBeastiful/qt-creator,farseerri/git_code,farseerri/git_code,amyvmiwei/qt-creator,colede/qtcreator,martyone/sailfish-qtcreator,kuba1/qtcreator,kuba1/qtcreator,Distrotech/qtcreator,kuba1/qtcreator,martyone/sailfish-qtcreator,colede/qtcreator,richardmg/qtcreator,Distrotech/qtcreator,Distrotech/qtcreator,AltarBeastiful/qt-creator,farseerri/git_code,xianian/qt-creator,maui-packages/qt-creator,richardmg/qtcreator,xianian/qt-creator,darksylinc/qt-creator,amyvmiwei/qt-creator,AltarBeastiful/qt-creator,maui-packages/qt-creator,darksylinc/qt-creator,Distrotech/qtcreator,xianian/qt-creator,AltarBeastiful/qt-creator,xianian/qt-creator,kuba1/qtcreator,danimo/qt-creator,richardmg/qtcreator,Distrotech/qtcreator