Fix:when start with source code not in docker env report 'UnicodeDec… (#5802)

### What problem does this PR solve?

fix:when start with  source code not in docker env report
"UnicodeDecodeError: 'gbk' codec can't decode byte 0xad in position 5:
illegal multibyte sequence" in windows

### Type of change

- [x] Bug Fix (non-breaking change which fixes an issue)

Co-authored-by: tangyu <1@1.com>

api/db/init_data.py

@@ -160,7 +160,7 @@ def add_graph_templates():
     dir = os.path.join(get_project_base_directory(), "agent", "templates")
     for fnm in os.listdir(dir):
         try:
-            cnvs = json.load(open(os.path.join(dir, fnm), "r"))
+            cnvs = json.load(open(os.path.join(dir, fnm), "r",encoding="utf-8"))
             try:
                 CanvasTemplateService.save(**cnvs)
             except Exception: