Add missing `default_runtime` to docs/crio.conf.5.md
@@ -77,6 +77,9 @@ The `crio.api` table contains settings for the kubelet/gRPC interface.
## CRIO.RUNTIME TABLE
The `crio.runtime` table contains settings pertaining to the OCI runtime used and options for how to set up and manage the OCI runtime.
+**default_runtime**="runc"
+ The _name_ of the OCI runtime to be used as the default.
+
**no_pivot**=*false*
If true, the runtime will not use `pivot_root`, but instead use `MS_MOVE`.
