rename pluginId for todo-backend & techdocs-backend to 'todo' and 'techdocs'

Signed-off-by: Oleg S <97077423+RobotSail@users.noreply.github.com>

.changeset/large-feet-wash.md

@@ -1,5 +1,6 @@
 ---
 '@backstage/plugin-techdocs-backend': minor
+'@backstage/plugin-todo-backend': patch
 ---
 
-Added alpha export of the `techdocsPlugin` using the new backend system
+Added alpha export of the `techdocsPlugin` using the new backend system. Renamed the `todoPlugin` pluginId from `todo-backend` to `todo`.

plugins/techdocs-backend/src/plugin.ts

@@ -37,7 +37,7 @@ import { createRouter } from '@backstage/plugin-techdocs-backend';
  * @alpha
  */
 export const techdocsPlugin = createBackendPlugin({
-  pluginId: 'techdocs-backend',
+  pluginId: 'techdocs',
   register(env) {
     env.registerInit({
       deps: {