bugfix: Correctly set learning rate from LR Finder when resuming #640

Job	Run time
pip (ubuntu-latest, cpu)	5s
conda (ubuntu-latest, nvidia)	4m 11s
conda (macos-latest, nvidia)	8s
conda (ubuntu-latest, cpu)	2m 51s
conda (macos-latest, cpu)	9s
pip (windows-latest, directml)	15s
pip (windows-latest, cpu)	13s
conda (windows-latest, directml)	9m 41s
conda (windows-latest, nvidia)	10m 43s
conda (ubuntu-latest, rocm)	3m 4s
conda (windows-latest, cpu)	8m 24s
	39m 44s

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