Add https://github.com/labstack/echo-prometheus to the middleware list in README.md

Author: aldas

README.md

@@ -106,11 +106,12 @@ func hello(c *echo.Context) error {
 
 Following list of middleware is maintained by Echo team.
 
-| Repository                                                                               | Description                                                                                                                                                                                                                                                                                                                           |
-|------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
-| [github.com/labstack/echo-jwt](https://github.com/labstack/echo-jwt)                     | [JWT](https://github.com/golang-jwt/jwt) middleware                                                                                                                                                                                                                                                                                   | 
-| [github.com/labstack/echo-contrib](https://github.com/labstack/echo-contrib)             | [casbin](https://github.com/casbin/casbin), [gorilla/sessions](https://github.com/gorilla/sessions), [jaegertracing](https://github.com/uber/jaeger-client-go), [prometheus](https://github.com/prometheus/client_golang/), [pprof](https://pkg.go.dev/net/http/pprof), [zipkin](https://github.com/openzipkin/zipkin-go) middlewares | 
-| [github.com/labstack/echo-opentelemetry](https://github.com/labstack/echo-opentelemetry) | [OpenTelemetry](https://opentelemetry.io/) middleware for tracing and metrics                                                                                                                                                                                                                                                         |
+| Repository                                                                               | Description                                                                                                                                                  |
+|------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| [github.com/labstack/echo-jwt](https://github.com/labstack/echo-jwt)                     | [JWT](https://github.com/golang-jwt/jwt) middleware                                                                                                          | 
+| [github.com/labstack/echo-contrib](https://github.com/labstack/echo-contrib)             | [casbin](https://github.com/casbin/casbin), [gorilla/sessions](https://github.com/gorilla/sessions), [pprof](https://pkg.go.dev/net/http/pprof)) middlewares | 
+| [github.com/labstack/echo-opentelemetry](https://github.com/labstack/echo-opentelemetry) | [OpenTelemetry](https://opentelemetry.io/) middleware for tracing and metrics                                                                                |
+| [github.com/labstack/echo-prometheus](https://github.com/labstack/echo-prometheus)       | [Prometheus](https://github.com/prometheus/client_golang/) middleware for Echo                                                                               |
 
 # Third-party middleware repositories