Update makefile and readme to 1.4.2 (#1056)

* Update makefile and readme to 1.4.2

* Remove an unnecessary and breaking line break

Author: javorszky

Makefile

@@ -1,4 +1,4 @@
-VERSION = 1.4.0
+VERSION = 1.4.2
 TAG = $(VERSION)
 PREFIX = nginx/nginx-prometheus-exporter
 # renovate: datasource=github-tags depName=golangci/golangci-lint

README.md

@@ -112,15 +112,15 @@ To start the exporter we use the [docker run](https://docs.docker.com/engine/ref
 - To export NGINX metrics, run:
 
   ```console
-  docker run -p 9113:9113 nginx/nginx-prometheus-exporter:1.4.0 --nginx.scrape-uri=http://<nginx>:8080/stub_status
+  docker run -p 9113:9113 nginx/nginx-prometheus-exporter:1.4.2 --nginx.scrape-uri=http://<nginx>:8080/stub_status
   ```
 
   where `<nginx>` is the IP address/DNS name, through which NGINX is available.
 
 - To export NGINX Plus metrics, run:
 
   ```console
-  docker run -p 9113:9113 nginx/nginx-prometheus-exporter:1.4.0 --nginx.plus --nginx.scrape-uri=http://<nginx-plus>:8080/api
+  docker run -p 9113:9113 nginx/nginx-prometheus-exporter:1.4.2 --nginx.plus --nginx.scrape-uri=http://<nginx-plus>:8080/api
   ```
 
   where `<nginx-plus>` is the IP address/DNS name, through which NGINX Plus is available.