fix(filename): fix usage of filenameTemplate

using filenameTemplate is incorrect
It would point to a .js filename.

Author: sokra

src/index.js

@@ -59,6 +59,7 @@ class MiniCssExtractPlugin {
     }
   }
 
+  /** @param {import("webpack").Compiler} compiler */
   apply(compiler) {
     compiler.hooks.thisCompilation.tap(pluginName, (compilation) => {
       compilation.dependencyFactories.set(
@@ -149,13 +150,9 @@ class MiniCssExtractPlugin {
               this.getChunkModules(chunk, chunkGraph)
             ).filter((module) => module.type === MODULE_TYPE);
 
-            const filenameTemplate =
-              chunk.filenameTemplate ||
-              chunk.hasRuntime() ||
-              chunk.isOnlyInitial()
-                ? ({ chunk: chunkData }) =>
-                    this.options.moduleFilename(chunkData)
-                : this.options.chunkFilename;
+            const filenameTemplate = chunk.canBeInitial()
+              ? ({ chunk: chunkData }) => this.options.moduleFilename(chunkData)
+              : this.options.chunkFilename;
 
             if (renderedModules.length > 0) {
               result.push({