Update script_x86.iss

Fix wrong folder for assimp.exe

packaging/windows-innosetup/script_x86.iss

@@ -53,7 +53,7 @@ Source: "..\..\bin\release\assimp-vc141-mt.dll";  DestDir: "{app}\bin\x86"
 Source: "..\..\bin\release\assimp_viewer.exe";    DestDir: "{app}\bin\x86"; Components: tools
 Source: "C:\Windows\SysWOW64\D3DCompiler_42.dll";     DestDir: "{app}\bin\x86"; Components: tools
 Source: "C:\Windows\SysWOW64\D3DX9_42.dll";           DestDir: "{app}\bin\x86"; Components: tools
-Source: "..\..\bin\release\x86\assimp.exe";           DestDir: "{app}\bin\x86"; Components: tools
+Source: "..\..\bin\release\assimp.exe";           DestDir: "{app}\bin\x86"; Components: tools
 
 
 ; Import libraries