Update legacy-url-mappings.yml (#1452)

Author: reakaleek

src/tooling/docs-assembler/legacy-url-mappings.yml

@@ -43,7 +43,7 @@ mappings:
   en/ecs-logging/php/: [ '2.0.0' ]
   en/ecs-logging/python/: [ '2.2.0' ]
   en/ecs-logging/ruby/: ['1.0.0']
-  en/ecs/: *stack
+  en/ecs/: [ '9.0+', '8.18', '8.17', '8.16', '8.15', '8.14', '8.13', '8.12', '8.11', '8.10', '8.9', '8.8', '8.7', '8.6', '8.5', '8.4', '8.3', '8.2', '8.1', '8.0', '1.12', '1.11', '1.10', '1.9', '1.8', '1.7', '1.6', '1.5', '1.4', '1.3', '1.2', '1.1', '1.0' ]
   en/elastic-stack-glossary/: []
   en/elastic-stack/: *stack
   en/elasticsearch/client/curator/: [ '8.0.21', '7.0', '6.0', '5.8', '5.7', '5.6', '5.5', '5.4', '5.3', '5.2', '5.1', '5.0', '4.3', '4.2', '4.1', '4.0', '3.5', '3.4', '3.3' ]