[tz] Why did you rename Russian zone name abbreviations

[Steffen Nurpmeso]

 |The CLDR has:
 |
 | <calendar type="gregorian">

There is also CLDR-as-JSON now, on, well, at least Github[1].
Officially that is!  Thanks to the Unicode people for that, even
though it doesn't seem i will ever need that as a programmer,
i once asked them for JSON, and now there is.  E.g.,

      "dates": {
        "calendars": {
          "gregorian": {
            "months": {
              "format": {
                "abbreviated": {
                  "1": "янв.",
                  "2": "февр.",
                  "3": "мар.",
                  "4": "апр.",
                  "5": "мая",
                  "6": "июн.",
                  "7": "июл.",
                  "8": "авг.",
                  "9": "сент.",
                  "10": "окт.",
                  "11": "нояб.",
                  "12": "дек."
                },

  [1] https://github.com/unicode-cldr/cldr-dates-full/tree/master/main

--steffen