Change np.int16 to np.uint32 in the response file reading

[GallegoSav]

Pascal noticed using np.int16 could lead to negative value in the response matrices if the bincontent become to large. So I change to uint32 in order to be safe

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 78.81%. Comparing base (3408ef9) to head (9a364ac).
Report is 2 commits behind head on develop.

Files with missing lines	Patch %	Lines
cosipy/response/FullDetectorResponse.py	0.00%	4 Missing ⚠️

Files with missing lines	Coverage Δ
cosipy/response/FullDetectorResponse.py	39.29% <0.00%> (ø)

[israelmcmc]

Thanks @GallegoSav and @scipascal . Given the nature of the change --simple, contained, and with no new code--- I'll bypass the coverage requirements and merge this.