chore(deps): bump openssh-sftp-client from 0.15.1 to 0.15.2 in /core #2152

Job	Run time
build_all_features	4m 43s
build_all_platforms (ubuntu-latest)	2m 33s
build_all_platforms (macos-latest)	2m 19s
build_default_features (ubuntu-latest)	36s
check_clippy	3m 52s
build_under_wasm	51s
build_default_features (macos-latest)	34s
build_default_features (windows-latest)	2m 19s
build_all_platforms (windows-latest)	5m 51s
check_docs	3m 33s
check_msrv	32s
unit	6m 26s
	34m 9s

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