build(deps): update grafana/alloy to v1.18.1

This MR contains the following updates:

| Package | Update | Change |
|---|---|---|
| [grafana/alloy](https://github.com/grafana/alloy) | patch | `v1.18.0` → `v1.18.1` |

MR created with the help of [el-capitano/tools/renovate-bot](https://gitlab.com/el-capitano/tools/renovate-bot).

**Proposed changes to behavior should be submitted there as MRs.**

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### Release Notes

<details>
<summary>grafana/alloy (grafana/alloy)</summary>

### [`v1.18.1`](https://github.com/grafana/alloy/releases/tag/v1.18.1)

[Compare Source](grafana/alloy@v1.18.0...v1.18.1)

##### Bug Fixes 🐛

- Add nop receiver to OTel Engine \[backport] ([#&#8203;6755](grafana/alloy#6755)) ([d7588f8](grafana/alloy@d7588f8)) ([@&#8203;blewis12](https://github.com/blewis12))
- Backport dependency upgrades to address CVE's GO-2026-6061 & GO-2026-5970 ([#&#8203;6836](grafana/alloy#6836)) ([4c3e8a6](grafana/alloy@4c3e8a6)) ([@&#8203;blewis12](https://github.com/blewis12), [@&#8203;thampiotr](https://github.com/thampiotr))

#### Upgrading

Read the [release notes] for specific instructions on upgrading from older versions:

[release notes]: https://grafana.com/docs/alloy/v1.18/release-notes/

#### Installation

Refer to our [installation guide] for how to install Grafana Alloy.

[installation guide]: https://grafana.com/docs/alloy/v1.18/get-started/install/

</details>

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This MR has been generated by [Mend Renovate](https://github.com/renovatebot/renovate).
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Author: ECG Bot

chezmoi/dot_config/aquaproj-aqua/aqua.yaml

@@ -228,7 +228,7 @@ packages:
 - name: opengrep/opengrep@v1.25.0
   description: Static code analysis engine to find security issues in code
   link: https://github.com/opengrep/opengrep
-- name: grafana/alloy@v1.18.0
+- name: grafana/alloy@v1.18.1
   description: OpenTelemetry Collector distribution with programmable pipelines
   link: https://github.com/grafana/alloy
 - name: jackchuka/confluence-md@v0.3.19