Update sql_exporter from 0.17.1 to 0.18.6

[prometheus-rpm-bot]

https://github.com/burningalchemist/sql_exporter/releases/tag/0.18.6
Release notes:

## SQL Exporter v0.18.6 - 🚨 Security release

This release resolves an issue caused by a dependency that increased the minimum version of Go specified in the `go.mod`.
This led to an unexpected build on a vulnerable version of Go (v1.25.3).
The current build uses Go v1.24.11 and the update to v1.25 will be included in the next release.

## What's Changed

Precompiled binaries are built with Go v1.24.11

* fix(build): restore minimal Go version to 1.24 by @burningalchemist in https://github.com/burningalchemist/sql_exporter/pull/866

CVE addressed:
- CVE-2025-61729
- CVE-2025-61727

**Full Changelog**: https://github.com/burningalchemist/sql_exporter/compare/0.18.5...0.18.6