Fixed doc typo (#2326)

diff --git a/imgui.h b/imgui.h
index c12f973..dd85944 100644
--- a/imgui.h
+++ b/imgui.h
@@ -2079,7 +2079,7 @@
 {
     // Members: Hot ~62/78 bytes
     float                       FontSize;           // <user set>   // Height of characters, set during loading (don't change after loading)
-    float                       Scale;              // = 1.f        // Base font scale, multiplied by the per-window font scale which you can adjust with SetFontScale()
+    float                       Scale;              // = 1.f        // Base font scale, multiplied by the per-window font scale which you can adjust with SetWindowFontScale()
     ImVec2                      DisplayOffset;      // = (0.f,0.f)  // Offset font rendering by xx pixels
     ImVector<ImFontGlyph>       Glyphs;             //              // All glyphs.
     ImVector<float>             IndexAdvanceX;      //              // Sparse. Glyphs->AdvanceX in a directly indexable way (more cache-friendly, for CalcTextSize functions which are often bottleneck in large UI).