Updated license wording

[jorgecarleitao]

Github was not identifying it as an Apache license v2 for some reason. Hopefully this will identify it.

[codecov]

Codecov Report

Merging #1138 (4bdb4ac) into main (b3583b6) will decrease coverage by 0.00%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1138      +/-   ##
==========================================
- Coverage   83.49%   83.48%   -0.01%     
==========================================
  Files         366      366              
  Lines       35635    35635              
==========================================
- Hits        29752    29751       -1     
- Misses       5883     5884       +1     

Impacted Files	Coverage Δ
src/array/binary/mod.rs	88.88% <0.00%> (-1.24%)	⬇️
src/io/ipc/read/reader.rs	96.19% <0.00%> (-0.35%)	⬇️
src/array/fixed_size_binary/mod.rs	88.00% <0.00%> (+0.50%)	⬆️
src/bitmap/immutable.rs	84.56% <0.00%> (+0.61%)	⬆️
src/bitmap/utils/slice_iterator.rs	98.78% <0.00%> (+1.21%)	⬆️

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