Fixed TensorImage being treated as an unsupported logging type

[BenCrulis]

Values of type TensorImage were being treated as unsupported despite having their own code branch line 186.

[ContinualAI-bot]

Oh no! It seems there are some PEP8 errors! 😕
Don't worry, you can fix them! 💪
Here's a report about the errors and where you can find them:

avalanche/logging/wandb_logger.py:167:81: E501 line too long (89 > 80 characters)
1       E501 line too long (89 > 80 characters)

[coveralls]

Pull Request Test Coverage Report for Build 4065879166

• 0 of 0 changed or added relevant lines in 0 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage remained the same at 73.66%

---

Totals
Change from base Build 4025802261:	0.0%
Covered Lines:	13798
Relevant Lines:	18732

---

💛 - Coveralls

[AntonioCarta]

Thank you, LGTM