Docs: Update templating.md (#22881)

Updated because these were moved to the 6.7 milestone.

docs/sources/reference/templating.md

@@ -348,13 +348,13 @@ This variable is only available in the Singlestat panel and can be used in the p
 Currently only supported for Prometheus data sources. This variable represents the range for the current dashboard. It is calculated by `to - from`. It has a millisecond and a second representation called `$__range_ms` and `$__range_s`.
 
 ### The $__dashboard Variable
-> Only available in Grafana v6.6+
+> Only available in Grafana v6.7+
 
 This variable is the UID of the current dashboard.
 `${__dashboard.name}` is the name of the current dashboard.
 
 ### The $__org Variable
-> Only available in Grafana v6.6+
+> Only available in Grafana v6.7+
 
 This variable is the ID of the current organization.
 `${__org.name}` is the name of the current organization.