update rock5b+ 3D file

Author: peterwang2050

i18n/en/docusaurus-plugin-content-docs/current/rock5/rock5b/download.md

@@ -194,7 +194,7 @@ Pins 1-31 widened to 0.3mm, two locator pins widened to 0.7mm
 - [v1.2 Schematic pdf](https://dl.radxa.com/rock5/5b+/docs/hw/radxa_rock5bp_v1.2_schematic.pdf)
 - [v1.2 Components Placement Map pdf](https://dl.radxa.com/rock5/5b+/docs/hw/radxa_rock5bp_v1.2_components_placement_map.pdf)
 - [v1.2 2D DXF](https://dl.radxa.com/rock5/5b+/docs/hw/radxa_rock5bp_v12_2d.zip)
-- [v1.2 3D STP](https://dl.radxa.com/rock5/5b+/docs/hw/radxa_rock5bp_v1.2_3d_stp.zip)
+- [v1.2 3D STP](https://dl.radxa.com/rock5/5b+/docs/hw/rock5bp_pcba_3d_V1_2_20250314.stp)
 
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