fix: umd file name

Author: terraputix

vite.config.cjs.ts

@@ -5,7 +5,7 @@ export default defineConfig({
 		exclude: ['@openmeteo/file-reader', '@openmeteo/file-format-wasm']
 	},
 	build: {
-		emptyOutDir: false, // so it doesn't wipe your main build
+		emptyOutDir: false, // so it doesn't wipe the main build
 		chunkSizeWarningLimit: 1200,
 		rollupOptions: {
 			external: ['@openmeteo/file-reader', '@openmeteo/file-format-wasm'],

vite.config.umd.ts

@@ -2,12 +2,12 @@ import { defineConfig } from 'vite';
 
 export default defineConfig({
 	build: {
-		emptyOutDir: false, // so it doesn't wipe your main build
+		emptyOutDir: false, // so it doesn't wipe the main build
 		lib: {
-			entry: 'src/index.ts', // or your main entry
+			entry: 'src/index.ts',
 			name: 'OpenMeteoMapboxLayer', // global variable name for UMD
 			formats: ['umd'],
-			fileName: 'index.js'
+			fileName: (_format) => `index.js`
 		},
 		rollupOptions: {
 			output: {