doc: update apache site link by imbajin · Pull Request #1867 · apache/hugegraph

@@             Coverage Diff              @@
##             master    #1867      +/-   ##
============================================
- Coverage     70.97%   66.93%   -4.05%     
  Complexity      980      980              
============================================
  Files           447      447              
  Lines         38072    38072              
  Branches       5401     5401              
============================================
- Hits          27022    25483    -1539     
- Misses         8403    10074    +1671     
+ Partials       2647     2515     -132