fix: correct wrong transcription of acceleration factor calculation

maccel/maccel.c

@@ -135,7 +135,7 @@ report_mouse_t pointing_device_task_maccel(report_mouse_t mouse_report) {
         // correct raw velocity for dpi
         const float velocity = dpi_correction * velocity_raw;
         // calculate mouse acceleration factor: f(dv) = c - ((c-1) / ((1 + e^(x(x - b)) * a/z)))
-        const float maccel_factor = g_maccel_config.limit - (g_maccel_config.limit - 1) / powf(1 + expf(g_maccel_config.takeoff * (velocity - g_maccel_config.limit)), g_maccel_config.growth_rate / g_maccel_config.takeoff);
+        const float maccel_factor = g_maccel_config.limit - (g_maccel_config.limit - 1) / powf(1 + expf(g_maccel_config.takeoff * (velocity - g_maccel_config.offset)), g_maccel_config.growth_rate / g_maccel_config.takeoff);
         // calculate accelerated delta X and Y values and clamp:
         const mouse_xy_report_t x = CONSTRAIN_REPORT(mouse_report.x * maccel_factor);
         const mouse_xy_report_t y = CONSTRAIN_REPORT(mouse_report.y * maccel_factor);