Fixed and clarified otlp related ids (#88)

Fixed duplicate id.
Clarified other id to reflect syslog-ng-otlp

Author: HofiOne

doc/_admin-guide/070_Destinations/315_syslog-otlp/000_otlp-destination-options.md

@@ -1,6 +1,6 @@
 ---
 title: syslog-ng-otlp() destination options 
-id: adm-dest-optel-opt
+id: adm-dest-sng-otlp-opt
 ---
 
 The following options are available for the `syslog-ng-otlp()` destination.

doc/_admin-guide/070_Destinations/315_syslog-otlp/README.md

@@ -1,7 +1,7 @@
 ---
 title: 'syslog-ng-otlp() destination'
 short_title: syslog-ng-otlp
-id: adm-dest-otlp
+id: adm-dest-sng-otlp
 description: >-
     In syslog-ng OSE 4.4 and later versions, the syslog-ng-otlp() source and destination make it possible to transfer the internal representation of log messages between syslog-ng OSE instances, using the OpenTelemetry protocol. The syslog-ng-otlp() utilizes the OpenTelemetry protocol for efficient and reliable log message transmission instead of the traditional syslog-ng() drivers, which rely on simple TCP connections.
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