Rename Slovakia and South Africa common spa translations

[joseppujol-innocv]

Correct the common translations for spa of:

• "República de Sudáfrica" to "Sudáfrica":

        "spa": {
            "official": "Rep\u00fablica de Sud\u00e1frica",
            "common": "Sud\u00e1frica"
        },
  

• "República Eslovaca" to "Eslovaquia":

        "spa": {
            "official": "Rep\u00fablica Eslovaca",
            "common": "Eslovaquia"
        },