Fix typo in next build log (#31295)

## Bug

- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Errors have helpful link attached, see `contributing.md`

## Feature

- [ ] Implements an existing feature request or RFC. Make sure the feature request has been accepted for implementation before opening a PR.
- [ ] Related issues linked using `fixes #number`
- [ ] Integration tests added
- [ ] Documentation added
- [ ] Telemetry added. In case of a feature if it's used or not.
- [ ] Errors have helpful link attached, see `contributing.md`

## Documentation / Examples

- [ ] Make sure the linting passes by running `yarn lint`

packages/next/build/index.ts

@@ -779,7 +779,7 @@ export default async function build(
             )
           }
           Log.warn(
-            `Restarted static page genertion for ${pagePath} because it took more than ${timeout} seconds`
+            `Restarted static page generation for ${pagePath} because it took more than ${timeout} seconds`
           )
         } else {
           const pagePath = arg