fix a couple of typos

site/how-it-works.md

@@ -47,4 +47,4 @@ first send it to peer 3:
 **See Also**
 
  * [Weave Router Sleeve Encapsulation](/site/how-it-works/router-encapsulation.md)
- * [How Weave Inteprets Network Topology](/site/how-it-works/network-topology.md)
+ * [How Weave Interprets Network Topology](/site/how-it-works/network-topology.md)

site/how-it-works/router-encapsulation.md

@@ -61,4 +61,4 @@ MAC discovery.
 
 **See Also**
 
- * [How Weave Net Inteprets Network Topology](/site/how-it-works/network-topology.md)
+ * [How Weave Net Interprets Network Topology](/site/how-it-works/network-topology.md)