docs: update HTTP badge URLs to HTTPS

Co-authored-by: KeloYuan <keloyuan@users.noreply.github.com>

Author: KeloYuan

README.md

@@ -1,13 +1,13 @@
 [![Latest release](https://img.shields.io/github/v/release/labstack/echo?style=flat-square&label=release&color=00afd1)](https://github.com/labstack/echo/releases)
 [![Last commit](https://img.shields.io/github/last-commit/labstack/echo/master?style=flat-square)](https://github.com/labstack/echo/commits/master)
 [![Sourcegraph](https://sourcegraph.com/github.com/labstack/echo/-/badge.svg?style=flat-square)](https://sourcegraph.com/github.com/labstack/echo?badge)
-[![GoDoc](http://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)](https://pkg.go.dev/github.com/labstack/echo/v5)
+[![GoDoc](https://img.shields.io/badge/go-documentation-blue.svg?style=flat-square)](https://pkg.go.dev/github.com/labstack/echo/v5)
 [![Go Report Card](https://goreportcard.com/badge/github.com/labstack/echo?style=flat-square)](https://goreportcard.com/report/github.com/labstack/echo)
 [![GitHub Workflow Status (with event)](https://img.shields.io/github/actions/workflow/status/labstack/echo/echo.yml?style=flat-square)](https://github.com/labstack/echo/actions)
 [![Codecov](https://img.shields.io/codecov/c/github/labstack/echo.svg?style=flat-square)](https://codecov.io/gh/labstack/echo)
 [![Forum](https://img.shields.io/badge/community-forum-00afd1.svg?style=flat-square)](https://github.com/labstack/echo/discussions)
 [![Twitter](https://img.shields.io/badge/twitter-@labstack-55acee.svg?style=flat-square)](https://twitter.com/labstack)
-[![License](http://img.shields.io/badge/license-mit-blue.svg?style=flat-square)](https://raw.githubusercontent.com/labstack/echo/master/LICENSE)
+[![License](https://img.shields.io/badge/license-mit-blue.svg?style=flat-square)](https://raw.githubusercontent.com/labstack/echo/master/LICENSE)
 
 ## Echo