docs: refresh LICENSE after the 2026-08-23 corrections

LICENSE

@@ -50,8 +50,10 @@ in the code repository, https://github.com/BillyChern/GSSC-S2D2.
 2. SCPNet -- scpnet_v2_port.pth (model repository only)
    Xia et al., CVPR 2023. https://github.com/SCPNet/Codes-for-SCPNet
 
-   SCPNet publishes NO upstream license. This file is a format port of SCPNet's
-   own pretrained weights, redistributed here with the SCPNet authors' explicit
+   SCPNet publishes NO upstream license. This file is SCPNet's own pretrained
+   checkpoint carried unmodified -- the "port" in its name is the spconv-2.3
+   kernel-shape patching applied at LOAD time, not a change to the file --
+   redistributed here with the SCPNet authors' explicit
    permission, with attribution to them as the originators. No license is
    asserted on their behalf; their repository remains the authoritative source.