Fix SchemaFinder's Javadoc

[joffrey-bion]

Resolves:
#36

[codecov]

Codecov Report

Merging #38 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master      #38   +/-   ##
=========================================
  Coverage     88.85%   88.85%           
  Complexity      262      262           
=========================================
  Files            32       32           
  Lines           610      610           
  Branches         83       83           
=========================================
  Hits            542      542           
  Misses           45       45           
  Partials         23       23

Impacted Files	Coverage Δ	Complexity Δ
...lynskyi/graphql/codegen/supplier/SchemaFinder.java	100% <ø> (ø)	11 <0> (ø)	⬇️

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