PercentTrue uses False instead of 0 as fill value

[rwedge]

PercentTrue primitive takes Boolean or BooleanNullable input data. The primitive function fills missing values using 0 but with Pandas 1.5 that does not seems to be supported for "Boolean" dtype. This PR changes the fill value to False

[codecov]

Codecov Report

Merging #2308 (6ffc475) into main (d322897) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #2308   +/-   ##
=======================================
  Coverage   99.37%   99.37%           
=======================================
  Files         145      145           
  Lines       17678    17682    +4     
=======================================
+ Hits        17568    17572    +4     
  Misses        110      110           

Impacted Files	Coverage Δ
...ools/primitives/standard/aggregation_primitives.py	99.68% <100.00%> (ø)
...tools/tests/primitive_tests/test_agg_primitives.py	100.00% <100.00%> (ø)

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