Process files that are not .png ones only to fix the mods.toml version field.

build.gradle.kts

@@ -83,7 +83,7 @@ allprojects {
                 }
             }
             val modVersionPair: Pair<String, String> = "mod_version" to (rootProject.version as String)
-            filesMatching(listOf("*.json", "*.toml")) {
+            filesNotMatching("*.png") {
                 expand(mutableMapOf(modVersionPair))
             }
         }