fix the dead link of debugging.md
fix the dead link of debugging.md

fix the dead link of debugging.md

whuwxl/heapster,thucatebay/heapster,AlmogBaku/heapster,huangyuqi/heapster,huangyuqi/heapster,piosz/heapster,ravihansa3000/heapster,saiwl/heapster,andyxning/heapster,luxas/heapster,luxas/heapster,skytap/heapster,shilpamayanna/heapster,liubog2008/heapster,mwringe/heapster,krzyzacy/heapster,burmanm/heapster,mwielgus/heapster,johanneswuerbach/heapster,andyxning/heapster,aegixx/heapster,whuwxl/heapster,a-robinson/heapster,digideskio/heapster,AlmogBaku/heapster,piosz/heapster,afein/heapster,aegixx/heapster,Stackdriver/heapster,ravihansa3000/heapster,Huawei-PaaS/heapster,johanneswuerbach/heapster,skytap/heapster,wulonghui/heapster,Huawei-PaaS/heapster,liubog2008/heapster,mdshuai/heapster,digideskio/heapster,wulonghui/heapster,titilambert/heapster,thucatebay/heapster,jackzampolin/heapster,taimir/heapster,a-robinson/heapster,adfin/statster,taimir/heapster,bluebreezecf/heapster,mwringe/heapster,vicki-c/heapster,jackzampolin/heapster,bluebreezecf/heapster,titilambert/heapster,bruceauyeung/heapster,burmanm/heapster,Stackdriver/heapster,saiwl/heapster,mdshuai/heapster,afein/heapster,adfin/statster,vicki-c/heapster,shilpamayanna/heapster,krzyzacy/heapster,mwielgus/heapster,bruceauyeung/heapster