tjf/api/error: fix typo in f-string
Typo, before this patch this was priting a literal 'f{cause}'.
Signed-off-by: Arturo Borrero Gonzalez aborrero@wikimedia.org
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Typo, before this patch this was priting a literal 'f{cause}'.
Signed-off-by: Arturo Borrero Gonzalez aborrero@wikimedia.org