deps(go): bump module github.com/spf13/viper to v1.21.0

[updateclibot]

deps(go): bump module github.com/spf13/viper

clean: go mod tidy

ran shell command "go mod tidy"

deps(go): bump module github.com/spf13/viper to v1.21.0

go.mod updated Module path "github.com/spf13/viper" version from "v1.20.1" to "v1.21.0"

v1.20.1

<!-- Release notes generated using configuration in .github/release.yml at v1.20.1 -->

## What's Changed
### Bug Fixes 🐛
* Backport config type fixes to 1.20.x by @sagikazarmark in https://github.com/spf13/viper/pull/2005


**Full Changelog**: https://github.com/spf13/viper/compare/v1.20.0...v1.20.1

v1.21.0

<!-- Release notes generated using configuration in .github/release.yml at v1.21.0 -->

## What's Changed
### Enhancements 🚀
* Add support for flags pflag.BoolSlice, pflag.UintSlice and pflag.Float64Slice by @nmvalera in https://github.com/spf13/viper/pull/2015
* feat: use maintained yaml library by @sagikazarmark in https://github.com/spf13/viper/pull/2040
### Bug Fixes 🐛
* fix(config): get config type from v.configType or config file ext by @GuillaumeBAECHLER in https://github.com/spf13/viper/pull/2003
* fix: config type check when loading any config by @sagikazarmark in https://github.com/spf13/viper/pull/2007
### Dependency Updates ⬆️
* Update dependencies by @sagikazarmark in https://github.com/spf13/viper/pull/1993
* build(deps): bump github.com/spf13/cast from 1.7.1 to 1.8.0 by @dependabot[bot] in https://github.com/spf13/viper/pull/2017
* build(deps): bump github.com/pelletier/go-toml/v2 from 2.2.3 to 2.2.4 by @dependabot[bot] in https://github.com/spf13/viper/pull/2013
* build(deps): bump github.com/sagikazarmark/locafero from 0.8.0 to 0.9.0 by @dependabot[bot] in https://github.com/spf13/viper/pull/2008
* build(deps): bump golang.org/x/net from 0.37.0 to 0.38.0 in /remote by @dependabot[bot] in https://github.com/spf13/viper/pull/2016
* build(deps): bump github.com/spf13/cast from 1.8.0 to 1.9.2 by @dependabot[bot] in https://github.com/spf13/viper/pull/2020
* build(deps): bump github.com/go-viper/mapstructure/v2 from 2.2.1 to 2.3.0 by @dependabot[bot] in https://github.com/spf13/viper/pull/2028
* build(deps): bump github.com/go-viper/mapstructure/v2 from 2.3.0 to 2.4.0 by @dependabot[bot] in https://github.com/spf13/viper/pull/2035
* build(deps): bump github.com/spf13/pflag from 1.0.6 to 1.0.7 by @dependabot[bot] in https://github.com/spf13/viper/pull/2036
* build(deps): bump github.com/fsnotify/fsnotify from 1.8.0 to 1.9.0 by @dependabot[bot] in https://github.com/spf13/viper/pull/2012
* build(deps): bump github.com/stretchr/testify from 1.10.0 to 1.11.1 by @dependabot[bot] in https://github.com/spf13/viper/pull/2052
* build(deps): bump github.com/go-viper/mapstructure/v2 from 2.3.0 to 2.4.0 in /remote by @dependabot[bot] in https://github.com/spf13/viper/pull/2048
* build(deps): bump github.com/spf13/pflag from 1.0.7 to 1.0.10 by @dependabot[bot] in https://github.com/spf13/viper/pull/2056
* chore: update dependencies by @sagikazarmark in https://github.com/spf13/viper/pull/2057
### Other Changes
* Update update guide with `mapstructure` package replacement. by @aldas in https://github.com/spf13/viper/pull/2004
* refactor: use the built-in max/min to simplify the code by @yingshanghuangqiao in https://github.com/spf13/viper/pull/2029

## New Contributors
* @GuillaumeBAECHLER made their first contribution in https://github.com/spf13/viper/pull/2003
* @aldas made their first contribution in https://github.com/spf13/viper/pull/2004
* @nmvalera made their first contribution in https://github.com/spf13/viper/pull/2015
* @yingshanghuangqiao made their first contribution in https://github.com/spf13/viper/pull/2029
* @ccoVeille made their first contribution in https://github.com/spf13/viper/pull/2046
* @spacez320 made their first contribution in https://github.com/spf13/viper/pull/2050

**Full Changelog**: https://github.com/spf13/viper/compare/v1.20.0...v1.21.0

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