fix: revert sf ui-bundle generate back to sf webapp generate in NUT helpers

The scaffolding command is provided by plugin-templates as
`sf webapp generate`, not by this plugin. It should not have been
renamed as part of the ui-bundle rename.

Author: garychangsf

test/commands/ui-bundle/helpers/webappProjectUtils.ts

@@ -98,12 +98,14 @@ export function createProject(session: TestSession, name: string): string {
 }
 
 /**
- * Run `sf project generate` then `sf ui-bundle generate --name <webAppName>` inside
+ * Run `sf project generate` then `sf webapp generate --name <webAppName>` inside
  * the project. Returns the absolute path to the generated project root.
+ *
+ * Note: `sf webapp generate` is provided by plugin-templates, not this plugin.
  */
 export function createProjectWithWebapp(session: TestSession, projectName: string, webAppName: string): string {
   const projectDir = createProject(session, projectName);
-  execSync(`sf ui-bundle generate --name ${webAppName}`, {
+  execSync(`sf webapp generate --name ${webAppName}`, {
     cwd: projectDir,
     stdio: 'pipe',
     env: { ...process.env, HOME: REAL_HOME, USERPROFILE: REAL_HOME },
@@ -122,7 +124,7 @@ export function createProjectWithMultipleWebapps(
 ): string {
   const projectDir = createProject(session, projectName);
   for (const name of webAppNames) {
-    execSync(`sf ui-bundle generate --name ${name}`, {
+    execSync(`sf webapp generate --name ${name}`, {
       cwd: projectDir,
       stdio: 'pipe',
       env: { ...process.env, HOME: REAL_HOME, USERPROFILE: REAL_HOME },