workaround scala 2.11 doc issue

[nevillelyh]

No description provided.

[codecov]

Codecov Report

Merging #2527 into master will increase coverage by 0.01%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2527      +/-   ##
==========================================
+ Coverage   68.12%   68.13%   +0.01%     
==========================================
  Files         207      207              
  Lines        7221     7221              
  Branches      347      331      -16     
==========================================
+ Hits         4919     4920       +1     
+ Misses       2302     2301       -1

Impacted Files	Coverage Δ
...main/scala/com/spotify/scio/util/BloomFilter.scala	92.75% <0%> (-0.73%)	⬇️
...y/scio/values/PairSkewedSCollectionFunctions.scala	95.31% <0%> (+3.12%)	⬆️

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