docs: update DENO_DEPLOY_APPLICATION_SLUG to DENO_DEPLOY_APP_SLUG (#3012)

Author: gentlementlegen

deploy/reference/env_vars_and_contexts.md

@@ -142,13 +142,13 @@ Environment variables have the following limits:
 Deno Deploy provides these predefined environment variables in all contexts:
 
 - `DENO_DEPLOY`: `true` - Indicates that the code is running in Deno Deploy.
-- `DENO_DEPLOY_ORGANIZATION_ID`: The ID of the organization that owns the
-  application. This is a UUID.
-- `DENO_DEPLOY_ORGANIZATION_SLUG`: The slug of the organization that owns the
+- `DENO_DEPLOY_ORG_ID`: The ID of the organization that owns the application.
+- This is a UUID.
+- `DENO_DEPLOY_ORG_SLUG`: The slug of the organization that owns the
   application. This is the human-readable identifier used in URLs that was set
   when creating the organization.
-- `DENO_DEPLOY_APPLICATION_ID`: The ID of the application. This is a UUID.
-- `DENO_DEPLOY_APPLICATION_SLUG`: The slug of the application. This is the
+- `DENO_DEPLOY_APP_ID`: The ID of the application. This is a UUID.
+- `DENO_DEPLOY_APP_SLUG`: The slug of the application. This is the
   human-readable identifier used in URLs that was set when creating the
   application, or changed later in the application settings.
 - `DENO_DEPLOY_BUILD_ID`: The ID of the currently running build.