[DOCS] Fix Usage API snippet test (#99497)

docs/reference/rest-api/usage.asciidoc

@@ -38,7 +38,7 @@ include::{es-repo-dir}/rest-api/common-parms.asciidoc[tag=master-timeout]
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 GET /_xpack/usage
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-// TEST[s/usage/usage?filter_path=-watcher.execution.actions.index*\,-watcher.execution.actions.logging*/]
+// TEST[s/usage/usage?filter_path=-watcher.execution.actions.index*\,-watcher.execution.actions.logging*,-watcher.execution.actions.email*/]
 // This response filter removes watcher logging results if they are included
 // to avoid errors in the CI builds.