scripts: gha: fix path to vgui_support submodule

scripts/gha/build_linux.sh

@@ -68,7 +68,7 @@ build_appimage()
 
 	cp SDL2_linux/lib/libSDL2-2.0.so.0 "$APPDIR/"
 	if [ "$ARCH" = "i386" ]; then
-		cp vgui_support/vgui-dev/lib/vgui.so "$APPDIR/"
+		cp 3rdparty/vgui_support/vgui-dev/lib/vgui.so "$APPDIR/"
 	fi
 
 	cat > "$APPDIR"/AppRun << 'EOF'

scripts/gha/build_win32.sh

@@ -17,7 +17,7 @@ fi
 
 if [ "$ARCH" = "i386" ]; then
 	cp SDL2_VC/lib/x86/SDL2.dll . # Install SDL2
-	cp vgui_support/vgui-dev/lib/win32_vc6/vgui.dll .
+	cp 3rdparty/vgui_support/vgui-dev/lib/win32_vc6/vgui.dll .
 elif [ "$ARCH" = "amd64" ]; then
 	cp SDL2_VC/lib/x64/SDL2.dll .
 else