fix(autoversion): try to correct for CI environment

convention/src/main/kotlin/jf.autoversion.gradle.kts

@@ -7,17 +7,20 @@ val isRelease = project.hasProperty("release")
 val specialCaseBuilds = setOf("forge", "fabric", "neoforge")
 fun List<Tag>.filter(): Pair<Tag, Tag?>? {
     if (isEmpty()) return null
-    if (size == 1) return first() to null
+    val envName = System.getenv("CI_COMMIT_TAG")
+    val current = envName?.let { v -> indexOfFirst { it.name == v } } ?: 0
+    if (current == -1) throw IllegalStateException("Current tag ($envName) not found in tag list")
+    if (size == current) return get(current) to null
 
-    val ver = SemanticVersion.tryParse(first().name)
+    val ver = SemanticVersion.tryParse(get(current).name)
     // special case: some mod projects use the format 1.0.0+forge to classify builds for different loaders
     // this ensures changelogs get generated within the same loader branch
     if (ver?.build in specialCaseBuilds) {
-        val preceding = drop(1).firstOrNull { SemanticVersion.tryParse(it.name)?.build == ver?.build }
-        if (preceding != null) return first() to preceding
+        val preceding = drop(current + 1).firstOrNull { SemanticVersion.tryParse(it.name)?.build == ver?.build }
+        if (preceding != null) return get(current) to preceding
     }
 
-    return first() to get(1)
+    return get(current) to get(current + 1)
 }
 
 versionS = "0.0.0+nogit"