Tests

Add notebook on loop autodiff #5333

Job	Run time
Check for changes	13s
Check code style	0s
All tests	3s
${{ matrix.os }} test py${{ matrix.python-version }} : fast-compile ${{ matrix.fast-compile }} : float32 ${{ matrix.float32 }} : ${{ matrix.part }}	0s
Benchmarks	0s
Upload coverage	0s
	16s

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