better go version

.circleci/config.yml

@@ -164,7 +164,7 @@ jobs:
         default: unit
         description: Test suite name to report to CircleCI.
     docker:
-      - image: cimg/go:1.20.7
+      - image: cimg/go:1.20
         environment:
           LOTUS_HARMONYDB_HOSTS: yugabyte
       - image: yugabytedb/yugabyte:2.18.0.0-b65
@@ -218,7 +218,7 @@ jobs:
           test with. If empty (the default) the commit defined by the git
           submodule is used.
     docker:
-      - image: cimg/go:1.20.7
+      - image: cimg/go:1.20
     resource_class: << parameters.resource_class >>
     steps:
       - install-ubuntu-deps
@@ -412,7 +412,7 @@ jobs:
         description: |
           Arguments to pass to golangci-lint
     docker:
-      - image: cimg/go:1.20.7
+      - image: cimg/go:1.20
     resource_class: medium+
     steps:
       - install-ubuntu-deps

go.mod

@@ -1,6 +1,6 @@
 module github.com/filecoin-project/lotus
 
-go 1.20.7
+go 1.20
 
 retract v1.14.0 // Accidentally force-pushed tag, use v1.14.1+ instead.