Update module github.com/labstack/echo/v4 to v4.9.1

[renovate[bot]]

This PR contains the following updates:

Package	Type	Update	Change
github.com/labstack/echo/v4	require	minor	v4.8.0 -> v4.9.1

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Release Notes

labstack/echo

### [`v4.9.1`](https://togithub.com/labstack/echo/blob/HEAD/CHANGELOG.md#v491---2022-10-12) [Compare Source](https://togithub.com/labstack/echo/compare/v4.9.0...v4.9.1) **Fixes** - Fix logger panicing (when template is set to empty) by bumping dependency version [#​2295](https://togithub.com/labstack/echo/issues/2295) **Enhancements** - Improve CORS documentation [#​2272](https://togithub.com/labstack/echo/pull/2272) - Update readme about supported Go versions [#​2291](https://togithub.com/labstack/echo/pull/2291) - Tests: improve error handling on closing body [#​2254](https://togithub.com/labstack/echo/pull/2254) - Tests: refactor some of the assertions in tests [#​2275](https://togithub.com/labstack/echo/pull/2275) - Tests: refactor assertions [#​2301](https://togithub.com/labstack/echo/pull/2301) ### [`v4.9.0`](https://togithub.com/labstack/echo/blob/HEAD/CHANGELOG.md#v490---2022-09-04) [Compare Source](https://togithub.com/labstack/echo/compare/v4.8.0...v4.9.0) **Security** - Fix open redirect vulnerability in handlers serving static directories (e.Static, e.StaticFs, echo.StaticDirectoryHandler) [#​2260](https://togithub.com/labstack/echo/pull/2260) **Enhancements** - Allow configuring ErrorHandler in CSRF middleware [#​2257](https://togithub.com/labstack/echo/pull/2257) - Replace HTTP method constants in tests with stdlib constants [#​2247](https://togithub.com/labstack/echo/pull/2247)

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