Bump build_runner from 2.16.1 to 2.16.2 in /generate_crossword/step_05_a (#2681)

Bumps [build_runner](https://github.com/dart-lang/build) from 2.16.1 to 2.16.2.
<details>
<summary>Release notes</summary>
<p><em>Sourced from <a href="https://github.com/dart-lang/build/releases">build_runner's releases</a>.</em></p>
<blockquote>
<h2>package:build_runner v2.16.2</h2>
<ul>
<li>Support <code>analyzer</code> 14.5.0. Require <code>analyzer</code> 14.3.0.</li>
</ul>
</blockquote>
</details>
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/dart-lang/build/commit/520fec44b1ae0558abb2da5dcd1f1b79b65bb3de"><code>520fec4</code></a> Release build_runner 2.16.2 and build_test 3.5.21: support analyzer 14.5.0. (...</li>
<li>See full diff in <a href="https://github.com/dart-lang/build/compare/build_runner-v2.16.1...build_runner-v2.16.2">compare view</a></li>
</ul>
</details>
<br />

[![Dependabot compatibility score](https://dependabot-badges.githubapp.com/badges/compatibility_score?dependency-name=build_runner&package-manager=pub&previous-version=2.16.1&new-version=2.16.2)](https://docs.github.com/en/github/managing-security-vulnerabilities/about-dependabot-security-updates#about-compatibility-scores)

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting `@dependabot rebase`.

---

<details>
<summary>Dependabot commands and options</summary>
<br />

You can trigger Dependabot actions by commenting on this PR:
- `@dependabot rebase` will rebase this PR
- `@dependabot recreate` will recreate this PR, overwriting any edits that have been made to it
- `@dependabot show <dependency name> ignore conditions` will show all of the ignore conditions of the specified dependency
- `@dependabot ignore this major version` will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this minor version` will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
- `@dependabot ignore this dependency` will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

</details>

Author: dependabot[bot]

generate_crossword/step_05_a/pubspec.lock

@@ -77,10 +77,10 @@ packages:
     dependency: "direct dev"
     description:
       name: build_runner
-      sha256: "894c243f6bc32015fec466ce30a6925bd537a77a426ee5bf481120477eb3de67"
+      sha256: "6feadd32d90a68253c1f7b4fcff76adb4b41ad32a53f8bad835dc65f01ac9dc5"
       url: "https://pub.dev"
     source: hosted
-    version: "2.16.1"
+    version: "2.16.2"
   built_collection:
     dependency: "direct main"
     description: