Fixed wrong section closing and added exampel to _CoqProject

_CoqProject

@@ -17,6 +17,7 @@ theories/examples/sort_br_del.v
 theories/examples/sort_fg.v
 theories/examples/map.v
 theories/examples/map_reduce.v
+theories/examples/subprotocols.v
 theories/logrel/model.v
 theories/logrel/kind_tele.v
 theories/logrel/subtyping.v

theories/examples/subprotocols.v

@@ -9,4 +9,4 @@ Section basics.
     (<! (l1 : loc)> MSG (#l1, #l2') {{ l1 ↦ #20 }}; END)%proto.
   Proof. iIntros "Hl2'" (l1) "Hl1". iExists l1, l2'. by iFrame "Hl1 Hl2'". Qed.
 
-End pair.
+End basics.