update template syntax docs
update template syntax docs

mahdaen/swig,xiaoyang2022/swig,mrazvan92/swig-template-callback,cwhatley/swig,CuteSephiroth/swig,cwhatley/swig,gogobook/swig,Lochlan/swig,paularmstrong/swig,notthetup/swig,zetlen/swig,jerrylin1002/swig,gitoneman/swig,mrazvan92/swig-async,jerrylin1002/swig,nickwah/swig,apiaryio/swig,benpptung/swig,cgvarela/swig,CuteSephiroth/swig,benpptung/swig,xiaoyang2022/swig,mahdaen/swig,mrazvan92/swig-async,mrazvan92/swig-template-callback,cgvarela/swig,benpptung/swig,zetlen/swig,xiaoyang2022/swig,Thunf/swiger,Lochlan/swig,gold3bear/swig,notthetup/swig,gogobook/swig,gitoneman/swig,gold3bear/swig,zongkelong/swig,zongkelong/swig,jerrylin1002/swig,mrazvan92/swig-async,cgvarela/swig,CuteSephiroth/swig,paularmstrong/swig,paularmstrong/swig,zetlen/swig,gold3bear/swig,mahdaen/swig,mrazvan92/swig-template-callback,Thunf/swiger,DragWeb/swig,jrvldam/swig,nickwah/swig,jrvldam/swig,Thunf/swiger,Lochlan/swig,genify/swig,cwhatley/swig,gitoneman/swig,notthetup/swig,jrvldam/swig,zongkelong/swig,gogobook/swig,DragWeb/swig,genify/swig,DragWeb/swig,apiaryio/swig,genify/swig