fix(deps): update module github.com/knadh/koanf/providers/file to v1.2.1 (open-telemetry#14320)

This PR contains the following updates:

| Package | Change |
[Age](https://docs.renovatebot.com/merge-confidence/) |
[Confidence](https://docs.renovatebot.com/merge-confidence/) |
|---|---|---|---|
|
[github.com/knadh/koanf/providers/file](https://redirect.github.com/knadh/koanf)
| `v1.2.0` -> `v1.2.1` |
![age](https://developer.mend.io/api/mc/badges/age/go/github.com%2fknadh%2fkoanf%2fproviders%2ffile/v1.2.1?slim=true)
|
![confidence](https://developer.mend.io/api/mc/badges/confidence/go/github.com%2fknadh%2fkoanf%2fproviders%2ffile/v1.2.0/v1.2.1?slim=true)
|

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### Release Notes

<details>
<summary>knadh/koanf (github.com/knadh/koanf/providers/file)</summary>

###
[`v1.2.1`](https://redirect.github.com/knadh/koanf/releases/tag/v1.2.1)

[Compare
Source](https://redirect.github.com/knadh/koanf/compare/v1.2.0...v1.2.1)

changelog for v1.2.0 -> v1.2.1

- [`29cce50`](https://redirect.github.com/knadh/koanf/commit/29cce50)
Merge pull request
[#&open-telemetry#8203;101](https://redirect.github.com/knadh/koanf/issues/101) from
e-nikolov/fix-pflag-map-types
- [`0202243`](https://redirect.github.com/knadh/koanf/commit/0202243)
posflag: add support for pflag map types

</details>

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cmd/builder/go.mod

@@ -8,7 +8,7 @@ go 1.24.0
 require (
 	github.com/knadh/koanf/parsers/yaml v1.1.0
 	github.com/knadh/koanf/providers/env/v2 v2.0.0
-	github.com/knadh/koanf/providers/file v1.2.0
+	github.com/knadh/koanf/providers/file v1.2.1
 	github.com/knadh/koanf/providers/fs v1.0.0
 	github.com/knadh/koanf/v2 v2.3.0
 	github.com/spf13/cobra v1.10.2