。
She changed her position.
Literal
She [topic-は] changed-stance.
転向 means 'conversion' or 'a change of stance/allegiance' — typically used for ideological or political shifts, not casual changes of opinion. The word carries historical weight in Japan, associated with the 転向文学 (tenkō bungaku) movement where left-wing intellectuals renounced their beliefs under government pressure in the 1930s. In modern usage it's broader but still implies a significant shift.