Fix typo in documentation
Fix typo in documentation

Fix typo in documentation in 'Ganeti.JSON'.

Signed-off-by: Jose A. Lopes <0fb9c4f8511df4ec2ae28af879e9d462f6218a2c@google.com>
Reviewed-by: Thomas Thrainer <98bdeac947eb8ca18146e9ce7f092788ec242cd1@google.com>

leshchevds/ganeti,mbakke/ganeti,yiannist/ganeti,leshchevds/ganeti,dimara/ganeti,yiannist/ganeti,andir/ganeti,onponomarev/ganeti,apyrgio/ganeti,bitemyapp/ganeti,grnet/snf-ganeti,mbakke/ganeti,mbakke/ganeti,apyrgio/snf-ganeti,apyrgio/ganeti,ganeti/ganeti,ganeti/ganeti,grnet/snf-ganeti,leshchevds/ganeti,ganeti-github-testing/ganeti-test-1,bitemyapp/ganeti,yiannist/ganeti,andir/ganeti,apyrgio/snf-ganeti,dimara/ganeti,onponomarev/ganeti,andir/ganeti,ganeti/ganeti,ganeti-github-testing/ganeti-test-1