[Python] SparseCOOTensor.__repr__ missing f-string prefix

[chilin0525]

Describe the bug, including details regarding any error messages, version, and platform.

The method was missing the f prefix, causing it to output literal {self.type} and {self.shape} instead of actual values:

arrow/python/pyarrow/tensor.pxi

Lines 361 to 364 in 15b7494

	def __repr__(self):
	return """<pyarrow.SparseCOOTensor>
	type: {self.type}
	shape: {self.shape}"""

Component(s)

Python

[raulcd]

Issue resolved by pull request 49109
#49109