chore: Update all imports to zod/v3

Signed-off-by: Gabriel Dugny <gabriel.dugny@believe.com>

docs/features/software-templates/writing-custom-actions.md

@@ -56,7 +56,7 @@ its generated unit test. We will replace the existing placeholder code with our
 import { resolveSafeChildPath } from '@backstage/backend-plugin-api';
 import { createTemplateAction } from '@backstage/plugin-scaffolder-node';
 import fs from 'fs-extra';
-import { type z } from 'zod';
+import { type z } from 'zod/v3';
 
 export const createNewFileAction = () => {
   return createTemplateAction({

docs/features/software-templates/writing-custom-field-extensions.md

@@ -290,7 +290,7 @@ and type for your field props to preventing having to duplicate the definitions:
 ```tsx
 //packages/app/src/scaffolder/MyCustomExtensionWithOptions/MyCustomExtensionWithOptions.tsx
 ...
-import { z } from 'zod';
+import { z } from 'zod/v3';
 import { makeFieldSchemaFromZod } from '@backstage/plugin-scaffolder';
 
 const MyCustomExtensionWithOptionsFieldSchema = makeFieldSchemaFromZod(