Documentation changelog

From v7.2 to v7.3

• Added references to the 3^rd^ version of the Sigfox radio: Sigfox APAC / LATAM module

• Updated sections for Sigfox APAC / LATAM

• Updated table of supported countries and regions

• New function added to configure the working region

From v7.1 to v7.2

• Changed the official names from 868 to EU and 900 to US

• Updated list of countries with Sigfox service

• Added "Region standards" section to explain differences between Sigfox zones and restrictions of use

From v7.0 to v7.1

• Added a new section to show the user how to connect the module to

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