update go version

Author: umputun

.github/workflows/ci.yml

@@ -11,10 +11,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - name: set up go 1.20
+      - name: set up go 1.23
         uses: actions/setup-go@v4
         with:
-          go-version: "1.20"
+          go-version: "1.23"
         id: go
 
       - name: checkout
@@ -35,7 +35,7 @@ jobs:
         with:
           version: latest
           skip-pkg-cache: true
-          
+
       - name: install  goveralls
         run: go install github.com/mattn/goveralls@latest