docs: update codemod package link

Author: MarcusNotheis

docs/MigrationGuide.mdx

@@ -46,7 +46,7 @@ we provide a codemod which tries to transform most of the breaking changes.
 />
 
 ```shell
-npx @ui5/webcomponents-react-cli@next codemod --transform v2 \
+npx @ui5/webcomponents-react-cli codemod --transform v2 \
     --src ./path/to/src \
     --typescript # only if you use TypeScript in your project, omit if you use JavaScript
 ```