Define markdown link-definitions for list ref into github

content/en/ecosystem/adopters.md

@@ -18,8 +18,7 @@ OpenTelemetry for [Observability](/docs/concepts/observability-primer/).
 ## Adding your organization as an adopter {#how-to-add}
 
 To have your organization listed, submit a PR with an entry added to the
-[adopters list](https://github.com/open-telemetry/opentelemetry.io/tree/main/data/ecosystem/adopters.yaml).
-The entry should include the following:
+[adopters list]. The entry should include the following:
 
 - Link to a blog post or other resource that describes how your organization
   makes use of OpenTelemetry
@@ -37,3 +36,6 @@ If your organization provides a solution that consumes OpenTelemetry to offer
 **Observability to end users**, see [Vendors](/ecosystem/vendors).
 
 {{% ecosystem/keep-up-to-date adopter %}}
+
+[adopters list]:
+  https://github.com/open-telemetry/opentelemetry.io/tree/main/data/ecosystem/adopters.yaml

content/en/ecosystem/distributions.md

@@ -25,8 +25,7 @@ is provided as a convenience for the community. {{% /alert %}}
 ## Adding your distribution {#how-to-add}
 
 To have your distribution listed, [submit a PR] with an entry added to the
-[distributions list](https://github.com/open-telemetry/opentelemetry.io/tree/main/data/ecosystem/distributions.yaml).
-The entry should include the following:
+[distributions list]. The entry should include the following:
 
 - Link to the main page of your distribution
 - Link to the documentation that explains how to use the distribution
@@ -50,3 +49,6 @@ The entry should include the following:
 [submit a PR]: /docs/contributing/pull-requests/
 
 {{% ecosystem/keep-up-to-date distribution %}}
+
+[distributions list]:
+  https://github.com/open-telemetry/opentelemetry.io/tree/main/data/ecosystem/distributions.yaml

content/en/ecosystem/vendors.md

@@ -22,8 +22,7 @@ source product for their customers.
 ## Adding your organization {#how-to-add}
 
 To have your organization listed, [submit a PR] with an entry added to the
-[vendors list](https://github.com/open-telemetry/opentelemetry.io/tree/main/data/ecosystem/vendors.yaml).
-The entry should include the following:
+[vendors list]. The entry should include the following:
 
 - Link to the documentation that details how your offering consumes
   OpenTelemetry natively via [OTLP](/docs/specs/otlp/).
@@ -46,3 +45,6 @@ OpenTelemetry, see [Integrations](/ecosystem/integrations/).
 [submit a PR]: /docs/contributing/pull-requests/
 
 {{% ecosystem/keep-up-to-date vendor %}}
+
+[vendors list]:
+  https://github.com/open-telemetry/opentelemetry.io/tree/main/data/ecosystem/vendors.yaml