Fix ExposeHeader XML tag in S3 GetBucketCors response

[kangasta]

Remove extra d from ExposeHeader XML tag in GetBucketCors response.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 94.59%. Comparing base (479c211) to head (c0e3e52).
Report is 6 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #8407   +/-   ##
=======================================
  Coverage   94.59%   94.59%           
=======================================
  Files        1163     1163           
  Lines      101636   101638    +2     
=======================================
+ Hits        96147    96149    +2     
  Misses       5489     5489           

Flag	Coverage Δ
servertests	28.83% <ø> (+<0.01%)	⬆️
unittests	94.57% <ø> (+<0.01%)	⬆️

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[bblommers]

Interesting - looks like this has been broken forever.

Can you also improve the existing boto3-test and assert that the ExposeHeader is now correctly returned?

moto/tests/test_s3/test_s3.py

Line 2309 in 3c4c72e

resp = s3_client.get_bucket_cors(Bucket=bucket_name)

We currently only assert that any CORSRules are returned, but we don't validate whether it actually returns the correct values.

[bblommers]

Great - thank you so much for the fix @kangasta!