OBSDOCS-1119: Add missing entries to the API support Monitoring table

Author: eromanova97

modules/api-support-tiers-mapping.adoc

@@ -123,6 +123,12 @@ API groups that end with the suffix `monitoring.coreos.com` have the following m
 |`v1`
 |Tier 1
 
+|`v1alpha1`
+|Tier 1
+
+|`v1beta1`
+|Tier 1
+
 |===
 endif::microshift[]