README: reminder to update public docs (#1353)

Adds a comment reminder (so users won't see it, but editors will) to update the public documentation when updating the supported versions

README.md

@@ -37,7 +37,7 @@ Datadog APM for Go is built upon dependencies defined in specific versions of th
 | <span id="support-legacy">Legacy</span>                | Legacy implementation. May have limited function, but no maintenance provided. [Contact our customer support team for special requests.](https://www.datadoghq.com/support/) |
 
 ### Supported Versions
-
+<!-- NOTE: When updating the below section ensure you update the minimum supported version listed in the public docs here: https://docs.datadoghq.com/tracing/setup_overview/setup/go/?tab=containers#compatibility-requirements -->
 | **Go Version** | **Support level**                   |
 |----------------|-------------------------------------|
 | 1.18           | [GA](#support-ga)                   |
@@ -46,6 +46,7 @@ Datadog APM for Go is built upon dependencies defined in specific versions of th
 
 * Datadog's Trace Agent >= 5.21.1
 
+
 #### Package Versioning
 
 A **Minor** version change will be released whenever a new version of Go is released. At that time the newest version of Go is added to [GA](#support-ga), the second oldest supported version moved to [Maintenance](#support-maintenance) and the oldest previously supported version dropped to [Legacy](#support-legacy).