fix tox check

Change-Id: I703dc2e51251cbb4273133b91ad8097ae5b6895c
Co-developed-by: Cursor <[email protected]>

Author: yyuuttaaoo

util/opentelemetry-util-genai/src/opentelemetry/util/genai/_upload/completion_hook.py

@@ -173,7 +173,8 @@ def _calculate_ref_path(
             # Get a hash of the text.
             system_instruction_hash = hashlib.sha256(
                 "\n".join(
-                    str(x.content) for x in system_instruction  # pyright: ignore[reportUnknownMemberType, reportAttributeAccessIssue, reportUnknownArgumentType]
+                    str(x.content)
+                    for x in system_instruction  # pyright: ignore[reportUnknownMemberType, reportAttributeAccessIssue, reportUnknownArgumentType]
                 ).encode("utf-8"),
                 usedforsecurity=False,
             ).hexdigest()