fix: reformat NL array in sb_openapi_specs_menu.json

[Copilot]

The NL versions array in menustructures/sb_openapi_specs_menu.json had array elements concatenated on the same line (e.g. }, {), inconsistent with the EN block formatting.

Changes

• menustructures/sb_openapi_specs_menu.json: Reformatted NL array so each element starts on its own line with consistent 4-space indentation, matching the EN block style

Before:

"nl": [
    {
        "name": "Versie 7.3.0",
        ...
    },            {
        "name": "Versie 7.2.0",
        ...
    },            {

After:

"nl": [
    {
        "name": "Versie 7.3.0",
        ...
    },
    {
        "name": "Versie 7.2.0",
        ...
    },
    {

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