fix relative docs links (#2559)

keep/README.md

@@ -64,7 +64,7 @@ The Keep integration does not include any events.
 Need help? Contact [Keep's Support team][5].
 
 [1]: https://app.datadoghq.com/integrations/keephq
-[2]: /developers/authorization/oauth2_in_datadog/
+[2]: https://docs.datadoghq.com/developers/authorization/oauth2_in_datadog/
 [3]: https://app.datadoghq.com/organization-settings/api-keys
 [4]: https://app.datadoghq.com/integrations
 [5]: mailto:[email protected]?subject=[Datadog]%20OAuth%20Integration%20Support

logstash/README.md

@@ -218,9 +218,9 @@ If you need further help, contact [Datadog support][22].
 [13]: https://github.com/DataDog/logstash-output-datadog_logs
 [14]: https://app.datadoghq.com/organization-settings/api-keys
 [15]: https://docs.datadoghq.com/agent/proxy/#proxy-for-logs
-[16]: /logs/#edit-reserved-attributes
-[17]: /logs/processing/#integration-pipelines
-[18]: /getting_started/tagging/assigning_tags
+[16]: https://docs.datadoghq.com/logs/#edit-reserved-attributes
+[17]: https://docs.datadoghq.com/logs/processing/#integration-pipelines
+[18]: https://docs.datadoghq.com/getting_started/tagging/assigning_tags
 [19]: https://app.datadoghq.com/infrastructure
 [20]: https://docs.datadoghq.com/agent/guide/agent-commands/#service-status
 [21]: https://github.com/DataDog/integrations-extras/blob/master/logstash/metadata.csv

neoload/README.md

@@ -40,4 +40,4 @@ Need help? Contact [Datadog support][5] or [Tricentis NeoLoad support][6].
 [4]: https://docs.datadoghq.com/events/
 [5]: https://docs.datadoghq.com/help/
 [6]: https://support-hub.tricentis.com/
-[7]: /metrics/explorer
+[7]: https://docs.datadoghq.com/metrics/explorer

vercel/README.md

@@ -46,10 +46,10 @@ Need help? Contact [Datadog support][8].
 [2]: https://vercel.com/
 [3]: https://vercel.com/docs/edge-network/overview
 [4]: https://vercel.com/docs/serverless-functions/introduction
-[5]: /logs/
-[6]: /synthetics/
+[5]: https://docs.datadoghq.com/logs/
+[6]: https://docs.datadoghq.com/synthetics/
 [7]: https://app.datadoghq.com/setup/vercel
-[8]: /help/
+[8]: https://docs.datadoghq.com/help/
 [9]: https://vercel.com/docs/functions
 [10]: https://vercel.com/docs/observability/log-drains
 [11]: https://github.com/DataDog/integrations-extras/blob/master/vercel/metadata.csv