Maya + Yeti: Load Yeti Cache fix frame number recognition

[BigRoy]

Brief description

Previously a cache starting at frame 1005 would fail due to a "5" being present. This would only be noticable if the start frame used for detection included a digit that was not 0, 1, 2, 3 or 4. I guess we've had the luck to always have been starting with a frame number like 1001, 1000, etc. because if any number in 56789 would have been present then this would previously fail.

Description

It's funny how long this must have been missed. We've been so lucky!
Looks like I introduced this bug five months ago. 🗡️

Testing notes:

1. Publish a yeti cache with 5, 6, 7, 8 or 9 in the frame number (e.g. single frame at frame 1005)
2. Load yeti cache should work.

[LiborBatek]

Did a test with publishing just frame 1005. All went smoothly and later loaded well into shot scene as yeti single frame cache.

So its working fine.