chore(deps): update dependency rules_xcodeproj to v2 (#993)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| rules_xcodeproj | bazel_dep | major | `1.18.0` -> `2.0.0` |

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined),
Automerge - At any time (no schedule defined).

🚦 **Automerge**: Enabled.

♻ **Rebasing**: Whenever PR is behind base branch, or you tick the
rebase/retry checkbox.

👻 **Immortal**: This PR will be recreated if closed unmerged. Get
[config help](https://togithub.com/renovatebot/renovate/discussions) if
that's undesired.

---

- [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check
this box

---

This PR has been generated by [Renovate
Bot](https://togithub.com/renovatebot/renovate).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzNi4xMDkuNCIsInVwZGF0ZWRJblZlciI6IjM2LjEwOS40IiwidGFyZ2V0QnJhbmNoIjoibWFpbiJ9-->

Co-authored-by: Self-hosted Renovate Bot <361546+cgrindel-self-hosted-renovate[bot]@users.noreply.github.enterprise.com>

examples/firebase_example/MODULE.bazel

@@ -26,7 +26,7 @@ bazel_dep(
 
 bazel_dep(
     name = "rules_xcodeproj",
-    version = "1.18.0",
+    version = "2.0.0",
     dev_dependency = True,
 )
 bazel_dep(

examples/ios_sim/MODULE.bazel

@@ -37,7 +37,7 @@ bazel_dep(
 )
 bazel_dep(
     name = "rules_xcodeproj",
-    version = "1.18.0",
+    version = "2.0.0",
     dev_dependency = True,
 )