Update generated Minecraft versions list to v26.1-alpha-2

Author: neoforged-renovate[bot]

src/generated/java/net/neoforged/moddevgradle/internal/generated/MinecraftVersionList.java

@@ -6,7 +6,7 @@
 public final class MinecraftVersionList {
     private MinecraftVersionList() {}
 
-    // renovate-mc-version: 26.1-alpha-1
+    // renovate-mc-version: 26.1-alpha-2
     /**
      * Released Minecraft Versions as of 2025-12-18T14:24:49.134717600Z from latest to oldest.
      */