dist/tools/git/git-cache: bump version
dist/tools/git/git-cache: bump version

Upstream contains important fixes:

- improve tag handling
- improve concurrent use
- clean up temporary tags

ant9000/RIOT,RIOT-OS/RIOT,toonst/RIOT,yogo1212/RIOT,OTAkeys/RIOT,OlegHahm/RIOT,RIOT-OS/RIOT,kYc0o/RIOT,cladmi/RIOT,yogo1212/RIOT,jasonatran/RIOT,OTAkeys/RIOT,josephnoir/RIOT,toonst/RIOT,authmillenon/RIOT,kYc0o/RIOT,jasonatran/RIOT,jasonatran/RIOT,miri64/RIOT,aeneby/RIOT,cladmi/RIOT,rfuentess/RIOT,yogo1212/RIOT,toonst/RIOT,x3ro/RIOT,rfuentess/RIOT,miri64/RIOT,rfuentess/RIOT,mtausig/RIOT,basilfx/RIOT,josephnoir/RIOT,smlng/RIOT,basilfx/RIOT,OlegHahm/RIOT,yogo1212/RIOT,smlng/RIOT,OlegHahm/RIOT,mtausig/RIOT,mtausig/RIOT,kaspar030/RIOT,rfuentess/RIOT,josephnoir/RIOT,OlegHahm/RIOT,mtausig/RIOT,cladmi/RIOT,smlng/RIOT,ant9000/RIOT,kYc0o/RIOT,kYc0o/RIOT,aeneby/RIOT,jasonatran/RIOT,OlegHahm/RIOT,ant9000/RIOT,aeneby/RIOT,cladmi/RIOT,toonst/RIOT,miri64/RIOT,OTAkeys/RIOT,toonst/RIOT,RIOT-OS/RIOT,x3ro/RIOT,kaspar030/RIOT,ant9000/RIOT,kaspar030/RIOT,authmillenon/RIOT,yogo1212/RIOT,smlng/RIOT,authmillenon/RIOT,miri64/RIOT,authmillenon/RIOT,RIOT-OS/RIOT,yogo1212/RIOT,rfuentess/RIOT,kYc0o/RIOT,kaspar030/RIOT,mtausig/RIOT,x3ro/RIOT,cladmi/RIOT,OTAkeys/RIOT,x3ro/RIOT,jasonatran/RIOT,basilfx/RIOT,josephnoir/RIOT,RIOT-OS/RIOT,aeneby/RIOT,miri64/RIOT,x3ro/RIOT,authmillenon/RIOT,aeneby/RIOT,smlng/RIOT,kaspar030/RIOT,authmillenon/RIOT,basilfx/RIOT,OTAkeys/RIOT,ant9000/RIOT,josephnoir/RIOT,basilfx/RIOT