fix: fix 'unspecified-encoding' for pylint

.pylintrc

@@ -38,4 +38,3 @@ disable=fixme,
         unnecessary-comprehension,
         unnecessary-lambda,
         unnecessary-lambda-assignment,
-        unspecified-encoding,

src/wuttaweb/views/upgrades.py

@@ -323,7 +323,7 @@ class UpgradeView(MasterView):
             size = os.path.getsize(path) - offset
             if size > 0:
                 # with open(path, 'rb') as f:
-                with open(path) as f:
+                with open(path, "rt", encoding="utf_8") as f:
                     f.seek(offset)
                     chunk = f.read(size)
                     # data['stdout'] = chunk.decode('utf8').replace('\n', '<br />')