docs: add unconfirmed IBs to eb-dag

Author: will-break-it

docs/workshop/eb-dag-detailed.d2

@@ -127,6 +127,16 @@ IB9: {
   label: "IB 9"
 }
 
+IB10: {
+  class: ib_unconfirmed
+  label: "IB 10"
+}
+
+IB11: {
+  class: ib_unconfirmed
+  label: "IB 11"
+}
+
 # RB references
 
 chain.RB1 -> chain.Genesis: {
@@ -266,4 +276,12 @@ IB9 -> EB6: "Ledger Ref" {
   class: ledger_link
 }
 
+IB10 -> EB7: "Ledger Ref" {
+  class: ledger_link
+}
+
+IB11 -> EB7: "Ledger Ref" {
+  class: ledger_link
+}
+
 direction: left