Update plugin_integration.md

Fix todo list markdown formatting

.github/ISSUE_TEMPLATE/plugin_integration.md

@@ -13,9 +13,9 @@ A written description of your plugin along with a link to the plugin repository.
 HashiCorp Technology partners https://www.hashicorp.com/partners/find-a-partner will be registered as a partner once verified. --->
 
 #### Checklist
-- [] Has valid [`metadata.hcl`](https://github.com/hashicorp/integration-template) file in plugin repository.
-- [] Has added integration scripts [packer-plugin-scaffolding](https://github.com/hashicorp/packer-plugin-scoffolding) to plugin repository.
-- [] Has added top-level integration README.md file to plugin `docs` directory.
-- [] All plugins components have one README.md describing their usage.
-- [] Has a fully synced `.web-docs` directory ready for publishing to the integrations portal.
+- [ ] Has valid [`metadata.hcl`](https://github.com/hashicorp/integration-template) file in plugin repository.
+- [ ] Has added integration scripts [packer-plugin-scaffolding](https://github.com/hashicorp/packer-plugin-scoffolding) to plugin repository.
+- [ ] Has added top-level integration README.md file to plugin `docs` directory.
+- [ ] All plugins components have one README.md describing their usage.
+- [ ] Has a fully synced `.web-docs` directory ready for publishing to the integrations portal.