use versionless feature

Signed-off-by: Gilbert Kwan <[email protected]>

README.adoc

@@ -190,7 +190,7 @@ threadpool_size{mp_scope="vendor",pool="Default_Executor",} 24.0
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 [role="no_copy"]
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-# HELP servlet_request_total The number of visits to this servlet since the start of the server.
+# HELP servlet_request_total The number of visits to this servlet ... the start of the server.
 # TYPE servlet_request_total counter
 servlet_request_total{mp_scope="vendor",servlet="guide_microprofile_metrics_io_openliberty_guides_system_SystemApplication",} 1.0
 servlet_request_total{mp_scope="vendor",servlet="guide_microprofile_metrics_io_openliberty_guides_inventory_InventoryApplication",} 3.0