Fix an encoding issue in gradio/components/code.py (#8077)

* Fix an enconding issue in gradio/components/code.py

Changes Made:
Modified the postprocess function in gradio/components/code.py to handle file encoding properly.
Added encoding="utf-8" parameter to the open function when reading code files. I hardcoded UTF-8 because I couldn't figure out how to specify the encoding, similar to the fix in #8075. My issue is #8076

* add changeset

---------

Co-authored-by: gradio-pr-bot <gradio-pr-bot@users.noreply.github.com>

.changeset/easy-sites-lie.md

@@ -0,0 +1,5 @@
+---
+"gradio": patch
+---
+
+fix:Fix an encoding issue in gradio/components/code.py

gradio/components/code.py

@@ -151,7 +151,7 @@ def postprocess(self, value: tuple[str] | str | None) -> None | str:
         if value is None:
             return None
         elif isinstance(value, tuple):
-            with open(value[0]) as file_data:
+            with open(value[0], encoding="utf-8") as file_data:
                 return file_data.read()
         else:
             return value.strip()