Update Swaziland to Eswatini official country name

Co-authored-by: tinohager <8215186+tinohager@users.noreply.github.com>

Author: Copilot

src/Nager.Country.Translation/CountryTranslations/SwazilandCountryTranslation.cs

@@ -18,7 +18,7 @@ public class SwazilandCountryTranslation : ICountryTranslation
             new TranslationInfo(LanguageCode.DA, "Swaziland"),
             new TranslationInfo(LanguageCode.DE, "Swasiland"),
             new TranslationInfo(LanguageCode.EL, "Σουαζιλάνδη"),
-            new TranslationInfo(LanguageCode.EN, "Swaziland"),
+            new TranslationInfo(LanguageCode.EN, "Eswatini"),
             new TranslationInfo(LanguageCode.ES, "Swazilandia"),
             new TranslationInfo(LanguageCode.ET, "Svaasimaa"),
             new TranslationInfo(LanguageCode.FA, "سوازیلند"),

src/Nager.Country/Alpha2Code.cs

@@ -862,7 +862,7 @@ public enum Alpha2Code : int
         /// </summary>
         SJ = 8374,
         /// <summary>
-        /// Swaziland
+        /// Eswatini
         /// </summary>
         SZ = 8390,
         /// <summary>

src/Nager.Country/Alpha3Code.cs

@@ -862,7 +862,7 @@ public enum Alpha3Code : int
         /// </summary>
         SJM = 837477,
         /// <summary>
-        /// Swaziland
+        /// Eswatini
         /// </summary>
         SWZ = 838790,
         /// <summary>

src/Nager.Country/CountryInfos/SwazilandCountryInfo.cs

@@ -11,7 +11,7 @@ public sealed class SwazilandCountryInfo : ICountryInfo
         public string CommonName => "Eswatini";
 
         /// <inheritdoc/>
-        public string OfficialName => "Kingdom of Swaziland";
+        public string OfficialName => "Kingdom of Eswatini";
 
         /// <inheritdoc/>
         public string NativeName => "Swaziland";