fix(java): logging message should not crash when there's no latestTag

[chingor13]

Fixes #423

[codecov]

Codecov Report

Merging #424 into master will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #424   +/-   ##
=======================================
  Coverage   89.34%   89.35%           
=======================================
  Files          30       30           
  Lines        3492     3494    +2     
  Branches      331      307   -24     
=======================================
+ Hits         3120     3122    +2     
  Misses        371      371           
  Partials        1        1           

Impacted Files	Coverage Δ
src/releasers/java-yoshi.ts	93.27% <100.00%> (+0.05%)	⬆️

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