Fixes const data access in template (#443)

Author: spacether

src/main/resources/python/components/schemas/schema_cls/validate/validate.hbs

@@ -134,7 +134,7 @@ def validate(
                             {{#if ../constInfo}}
 ) -> typing.Literal[
                                     {{#each ../constInfo.typeToValues.string}}
-    "{{{value}}}",
+    "{{{@key.value}}}",
                                     {{/each}}
 ]:
                             {{else}}
@@ -156,7 +156,7 @@ def validate(
                                     {{#if ../constInfo}}
 ) -> typing.Literal[
                                             {{#each ../constInfo.typeToValues.integer}}
-    {{{value}}},
+    {{{@key.value}}},
                                             {{/each}}
 ]:
                                     {{else}}
@@ -198,7 +198,7 @@ def validate(
                 {{#eq this "string"}}
     return typing.cast(typing.Literal[
                     {{#each ../constInfo.typeToValues.string}}
-            "{{{value}}}",
+            "{{{@key.value}}}",
                     {{/each}}
         ],
         validated_arg