Upgrade opal-common and opal-client to version 0.8.1

Author: danyi1212

requirements.txt

@@ -14,5 +14,5 @@ httpx>=0.27.0,<1
 # TODO: change to use re2 in the future, currently not supported in alpine due to c++ library issues
 # google-re2 # use re2 instead of re for regex matching because it's simiplier and safer for user inputted regexes
 protobuf>=3.20.2 # not directly required, pinned by Snyk to avoid a vulnerability
-opal-common==0.8.1rc1
-opal-client==0.8.1rc1
+opal-common==0.8.1
+opal-client==0.8.1