chore: bump ex_doc version

Author: efcasado

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/ElixirClientCodegen.java

@@ -61,7 +61,7 @@ public class ElixirClientCodegen extends DefaultCodegen {
     List<String> extraApplications = Arrays.asList(":logger");
     List<String> deps = Arrays.asList(
             "{:tesla, \"~> 1.14\"}",
-            "{:ex_doc, \"~> 0.30\", only: :dev, runtime: false}",
+            "{:ex_doc, \"~> 0.37.3\", only: :dev, runtime: false}",
             "{:dialyxir, \"~> 1.3\", only: [:dev, :test], runtime: false}");
 
     public ElixirClientCodegen() {