Fix issue with files containing jpg

[Sid220]

Files containing jpg in them like a lot of Roboflow exports have, for example 0AE5531F-906F-461B-88A1-246C569F0E0D_jpg.rf.06d5884d72dac1031f6a6c54370e6492.jpg where causing the example to search for the annotation in 0AE5531F-906F-461B-88A1-246C569F0E0D_xml.rf.06d5884d72dac1031f6a6c54370e6492.xml instead of 0AE5531F-906F-461B-88A1-246C569F0E0D_jpg.rf.06d5884d72dac1031f6a6c54370e6492.xml because all instances of jpg where simply being replaced with xml.

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