fix(deps): update module github.com/beevik/etree to v1.6.0 (#7)

This PR contains the following updates:

| Package | Change | Age | Confidence |
|---|---|---|---|
| [github.com/beevik/etree](https://github.com/beevik/etree) | `v1.5.0` -> `v1.6.0` | [![age](https://developer.mend.io/api/mc/badges/age/go/github.com%2fbeevik%2fetree/v1.6.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) | [![confidence](https://developer.mend.io/api/mc/badges/confidence/go/github.com%2fbeevik%2fetree/v1.5.0/v1.6.0?slim=true)](https://docs.renovatebot.com/merge-confidence/) |

---

### Release Notes

<details>
<summary>beevik/etree (github.com/beevik/etree)</summary>

### [`v1.6.0`](https://github.com/beevik/etree/releases/tag/v1.6.0)

[Compare Source](https://github.com/beevik/etree/compare/v1.5.1...v1.6.0)

**Changes**

- Added new iterator versions of existing functions that return slices of  `Element` pointers: `ChildElementsSeq`, `SelectElementsSeq`, `FindElementsSeq`, and `FindElementsPathSeq`.
- Improved performance of functions that return a single element.
- Because of its use of iterators, this package now requires go 1.23 or later.

### [`v1.5.1`](https://github.com/beevik/etree/releases/tag/v1.5.1)

[Compare Source](https://github.com/beevik/etree/compare/v1.5.0...v1.5.1)

**Fixes**

- Fixed a bug in InsertChildAt.

</details>

---

### Configuration

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♻ **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.

---

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---

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Reviewed-on: #7
Co-authored-by: renovate[bot] <renovate-bot@git.tainton.uk>
Co-committed-by: renovate[bot] <renovate-bot@git.tainton.uk>

go.mod

@@ -3,7 +3,7 @@ module shamilnunhuck/saml-oidc-bridge
 go 1.24.0
 
 require (
-	github.com/beevik/etree v1.5.0
+	github.com/beevik/etree v1.6.0
 	github.com/coreos/go-oidc/v3 v3.16.0
 	github.com/crewjam/saml v0.5.1
 	github.com/fsnotify/fsnotify v1.9.0

go.sum

@@ -2,6 +2,8 @@ github.com/beevik/etree v1.1.0 h1:T0xke/WvNtMoCqgzPhkX2r4rjY3GDZFi+FjpRZY2Jbs=
 github.com/beevik/etree v1.1.0/go.mod h1:r8Aw8JqVegEf0w2fDnATrX9VpkMcyFeM0FhwO62wh+A=
 github.com/beevik/etree v1.5.0 h1:iaQZFSDS+3kYZiGoc9uKeOkUY3nYMXOKLl6KIJxiJWs=
 github.com/beevik/etree v1.5.0/go.mod h1:gPNJNaBGVZ9AwsidazFZyygnd+0pAU38N4D+WemwKNs=
+github.com/beevik/etree v1.6.0 h1:u8Kwy8pp9D9XeITj2Z0XtA5qqZEmtJtuXZRQi+j03eE=
+github.com/beevik/etree v1.6.0/go.mod h1:bh4zJxiIr62SOf9pRzN7UUYaEDa9HEKafK25+sLc0Gc=
 github.com/coreos/go-oidc/v3 v3.11.0 h1:Ia3MxdwpSw702YW0xgfmP1GVCMA9aEFWu12XUZ3/OtI=
 github.com/coreos/go-oidc/v3 v3.11.0/go.mod h1:gE3LgjOgFoHi9a4ce4/tJczr0Ai2/BoDhf0r5lltWI0=
 github.com/coreos/go-oidc/v3 v3.16.0 h1:qRQUCFstKpXwmEjDQTIbyY/5jF00+asXzSkmkoa/mow=