Use IANA tzdb 2025c (#591)

Author: fzhinkin

README.md

@@ -552,7 +552,7 @@ kotlin {
     sourceSets {
         val wasmWasiMain by getting {
             dependencies {
-                implementation("kotlinx-datetime-zoneinfo", "2025b-spi.0.7.1")
+                implementation("kotlinx-datetime-zoneinfo", "2025c-spi.0.7.1")
             }
         }
     }

gradle.properties

@@ -5,7 +5,7 @@ group=org.jetbrains.kotlinx
 version=0.7.1
 versionSuffix=SNAPSHOT
 
-tzdbVersion=2025b
+tzdbVersion=2025c
 
 defaultKotlinVersion=2.1.20
 dokkaVersion=2.0.0