Add reuse document to MkDocs YML to add to doc site (#3535)

Signed-off-by: Stephen Curran <swcurran@gmail.com>

mkdocs.yml

@@ -93,6 +93,7 @@ nav:
     - Qualified DIDs: features/QualifiedDIDs.md
     - DID Methods: features/DIDMethods.md
     - DID Resolution: features/DIDResolution.md
+    - Reusing DIDComm Connections Between Agents: features/ReuseConnection.md
     - Publishing AnonCreds Objects To Other Ledgers/Verifiable Data Registries: features/AnonCredsMethods.md
     - Configuring Multiple Indy Ledgers: features/Multiledger.md
     - Automatically Endorsing Indy Transations: features/Endorser.md