Update dependency shoulda-matchers to v6.4.0 (#170)

This PR contains the following updates:

| Package | Change | Age | Adoption | Passing | Confidence |
|---|---|---|---|---|---|
| [shoulda-matchers](https://matchers.shoulda.io)
([source](https://togithub.com/thoughtbot/shoulda-matchers),
[changelog](https://togithub.com/thoughtbot/shoulda-matchers/blob/main/CHANGELOG.md))
| `6.2.0` -> `6.4.0` |
[![age](https://developer.mend.io/api/mc/badges/age/rubygems/shoulda-matchers/6.4.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![adoption](https://developer.mend.io/api/mc/badges/adoption/rubygems/shoulda-matchers/6.4.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![passing](https://developer.mend.io/api/mc/badges/compatibility/rubygems/shoulda-matchers/6.2.0/6.4.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|
[![confidence](https://developer.mend.io/api/mc/badges/confidence/rubygems/shoulda-matchers/6.2.0/6.4.0?slim=true)](https://docs.renovatebot.com/merge-confidence/)
|

---

### Release Notes

<details>
<summary>thoughtbot/shoulda-matchers (shoulda-matchers)</summary>

###
[`v6.4.0`](https://togithub.com/thoughtbot/shoulda-matchers/blob/HEAD/CHANGELOG.md#640---2024-08-16)

[Compare
Source](https://togithub.com/thoughtbot/shoulda-matchers/compare/v6.3.1...v6.4.0)

###
[`v6.3.1`](https://togithub.com/thoughtbot/shoulda-matchers/blob/HEAD/CHANGELOG.md#631---2024-08-13)

[Compare
Source](https://togithub.com/thoughtbot/shoulda-matchers/compare/v6.3.0...v6.3.1)

###
[`v6.3.0`](https://togithub.com/thoughtbot/shoulda-matchers/blob/HEAD/CHANGELOG.md#630---2024-08-09)

[Compare
Source](https://togithub.com/thoughtbot/shoulda-matchers/compare/v6.2.0...v6.3.0)

</details>

---

### Configuration

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

🚦 **Automerge**: Disabled by config. Please merge this manually once you
are satisfied.

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

🔕 **Ignore**: Close this PR and you won't be reminded about this update
again.

---

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

---

This PR was generated by [Mend Renovate](https://mend.io/renovate/).
View the [repository job
log](https://developer.mend.io/github/powerhome/power-web-development-interview).

<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOC4yMC4xIiwidXBkYXRlZEluVmVyIjoiMzguNTYuMCIsInRhcmdldEJyYW5jaCI6Im1haW4iLCJsYWJlbHMiOltdfQ==-->

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Gemfile.lock

@@ -90,7 +90,7 @@ GEM
       coffee-script-source
       execjs
     coffee-script-source (1.12.2)
-    concurrent-ruby (1.2.3)
+    concurrent-ruby (1.3.4)
     crass (1.0.6)
     date (3.3.4)
     diff-lcs (1.5.1)
@@ -130,7 +130,7 @@ GEM
     method_source (1.0.0)
     mini_mime (1.1.5)
     mini_portile2 (2.8.7)
-    minitest (5.22.3)
+    minitest (5.25.1)
     msgpack (1.7.2)
     mysql2 (0.5.6)
     net-imap (0.3.7)
@@ -230,7 +230,7 @@ GEM
       rubyzip (>= 1.2.2, < 3.0)
       websocket (~> 1.0)
     semantic_range (3.0.0)
-    shoulda-matchers (6.2.0)
+    shoulda-matchers (6.4.0)
       activesupport (>= 5.2.0)
     simplecov (0.22.0)
       docile (~> 1.1)