Fix typo in nonexact env var (#30703)

Author: JacksonDavenport

content/en/agent/configuration/proxy.md

@@ -73,7 +73,7 @@ DD_PROXY_HTTP="http://<USER>:<PASSWORD>@<PROXY_HOST>:<PROXY_PORT>"
 DD_PROXY_HTTPS="http://<USER>:<PASSWORD>@<PROXY_HOST>:<PROXY_PORT>"
 
 DD_PROXY_NO_PROXY="<HOST_TO_BYPASS_1> <HOST_TO_BYPASS_2>"
-DD_PROXY_NO_PROXY_NONE_EXACT_MATCH=true
+DD_NO_PROXY_NONEXACT_MATCH=true
 
 DD_LOGS_CONFIG_FORCE_USE_HTTP=true
 ```