fix doc building error

Author: zuhengxu

docs/src/api.md

@@ -61,6 +61,11 @@ and hope to generate approximate samples from it.
 ```@docs
 NormalizingFlows.elbo
 ```
+
+```@docs
+NormalizingFlows.elbo_batch
+```
+
 #### Log-likelihood
 
 By maximizing the log-likelihood, it is equivalent to minimizing the forward KL divergence between $q_\theta$ and $p$, i.e., 

docs/src/index.md

@@ -21,7 +21,7 @@ See the [documentation](https://turinglang.org/NormalizingFlows.jl/dev/) for mor
 To install the package, run the following command in the Julia REPL:
 ```
 ]  # enter Pkg mode
-(@v1.9) pkg> add [email protected]:TuringLang/NormalizingFlows.jl.git
+(@v1.11) pkg> add [email protected]:TuringLang/NormalizingFlows.jl.git
 ```
 Then simply run the following command to use the package:
 ```julia