Fix autodocs build issue

docs/src/index.md

@@ -62,5 +62,16 @@ Insights from [Benjamin Talbot](https://github.com/Benjamin-Talbot) and [Peter L
 
 Additional thanks to [Madiha Waqar](https://github.com/madihaahmed1) for the *GraphQuantum* logo.
 
+## Index
+
+### `QuantumStateTransfer`
+
+```@index
+Modules = [QuantumStateTransfer]
+```
+
+### `QuantumStateTransfer.EpsilonOptimization`
+
 ```@index
+Modules = [QuantumStateTransfer.EpsilonOptimization]
 ```

docs/src/private_api.md

@@ -14,6 +14,11 @@ Modules = [QuantumStateTransfer]
 Public = false
 ```
 
+```@autodocs
+Modules = [QuantumStateTransfer.EpsilonOptimization]
+Public = false
+```
+
 ## References
 
 ```@bibliography

docs/src/public_api.md

@@ -14,6 +14,11 @@ Modules = [QuantumStateTransfer]
 Private = false
 ```
 
+```@autodocs
+Modules = [QuantumStateTransfer.EpsilonOptimization]
+Private = false
+```
+
 ## References
 
 ```@bibliography