DOC: Change the `ITKGitCheatSheet.tex` file tittle.
DOC: Change the `ITKGitCheatSheet.tex` file tittle.

Change the cheat sheet title to reflect that it is not only about
committing.

Change-Id: If33b40cced02d9bd8283f1bf5d3fcda982a1b0b5

hjmjohnson/ITK,fbudin69500/ITK,hjmjohnson/ITK,InsightSoftwareConsortium/ITK,stnava/ITK,stnava/ITK,hjmjohnson/ITK,blowekamp/ITK,LucasGandel/ITK,blowekamp/ITK,InsightSoftwareConsortium/ITK,Kitware/ITK,BRAINSia/ITK,InsightSoftwareConsortium/ITK,malaterre/ITK,blowekamp/ITK,LucasGandel/ITK,Kitware/ITK,BRAINSia/ITK,fbudin69500/ITK,malaterre/ITK,spinicist/ITK,malaterre/ITK,stnava/ITK,LucasGandel/ITK,richardbeare/ITK,InsightSoftwareConsortium/ITK,Kitware/ITK,vfonov/ITK,vfonov/ITK,vfonov/ITK,InsightSoftwareConsortium/ITK,spinicist/ITK,richardbeare/ITK,BRAINSia/ITK,thewtex/ITK,BRAINSia/ITK,thewtex/ITK,hjmjohnson/ITK,blowekamp/ITK,fbudin69500/ITK,vfonov/ITK,richardbeare/ITK,BRAINSia/ITK,spinicist/ITK,Kitware/ITK,vfonov/ITK,malaterre/ITK,fbudin69500/ITK,fbudin69500/ITK,stnava/ITK,vfonov/ITK,richardbeare/ITK,Kitware/ITK,hjmjohnson/ITK,spinicist/ITK,InsightSoftwareConsortium/ITK,spinicist/ITK,thewtex/ITK,LucasGandel/ITK,InsightSoftwareConsortium/ITK,spinicist/ITK,hjmjohnson/ITK,fbudin69500/ITK,LucasGandel/ITK,BRAINSia/ITK,blowekamp/ITK,vfonov/ITK,thewtex/ITK,stnava/ITK,fbudin69500/ITK,malaterre/ITK,stnava/ITK,Kitware/ITK,thewtex/ITK,Kitware/ITK,stnava/ITK,spinicist/ITK,fbudin69500/ITK,blowekamp/ITK,LucasGandel/ITK,LucasGandel/ITK,stnava/ITK,blowekamp/ITK,stnava/ITK,hjmjohnson/ITK,spinicist/ITK,thewtex/ITK,richardbeare/ITK,richardbeare/ITK,thewtex/ITK,blowekamp/ITK,richardbeare/ITK,malaterre/ITK,LucasGandel/ITK,vfonov/ITK,malaterre/ITK,spinicist/ITK,malaterre/ITK,malaterre/ITK,BRAINSia/ITK,vfonov/ITK