[en] Add missing required `type` field to LimitRange example (#38706)

* Add missing required `type` field to examples

Although `LimitRange.spec.limits.type` was mandated in 2020, a few
LimitRange examples still miss the field, so they may confuse people
referring.

* Add missing required `type` field

Although `LimitRange.spec.limits.type` was mandated in 2020, one
LimitRange example still misses the field, so a validation error may
confuse people referring.

content/en/examples/concepts/policy/limit-range/problematic-limit-range.yaml

@@ -12,3 +12,4 @@ spec:
       cpu: "1"
     min:
       cpu: 100m
+    type: Container