microbenchmarks link in the home page of caliper wiki is not right

[qudongfang]

Caliper takes measurements of your Java code. Our primary focus is microbenchmarks, but it can support arbitrary kinds of measurements including memory allocated, memory consumed, or arbitrary domain-specific measurements like compression ratio.

Please change JavaMicrobenchmarks.md to JavaMicrobenchmarks.

[kluever]

Done, thanks!