docs: remove stray code fence causing incorrect formatting

Removes a stray code fence that causes the block to render incorrectly in https://docs.bazel.build/versions/master/configurable-attributes.html#and-chaining

Closes #12468.

PiperOrigin-RevId: 342185570
diff --git a/site/docs/configurable-attributes.md b/site/docs/configurable-attributes.md
index 95f0217..08b2be9 100644
--- a/site/docs/configurable-attributes.md
+++ b/site/docs/configurable-attributes.md
@@ -521,7 +521,6 @@
 If you need a `select` branch to match when multiple conditions match, use the
 [Skylib](https://github.com/bazelbuild/bazel-skylib) macro
 [config_setting_group](https://github.com/bazelbuild/bazel-skylib/blob/master/docs/selects_doc.md#selectsconfig_setting_group):
-```
 
 ```python
 config_setting(
@@ -542,7 +541,7 @@
     deps = select({
         ":config1_and_2": [":standard_lib"],
         "//conditions:default": [":other_lib"],
-        }),
+    }),
 )
 ```