Go 1.20.1

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>

.github/workflows/ci.yml

@@ -12,7 +12,7 @@ on:
 env:
   # Go version we currently use to build containerd across all CI.
   # Note: don't forget to update `Binaries` step, as it contains the matrix of all supported Go versions.
-  GO_VERSION: "1.19.6"
+  GO_VERSION: "1.20.1"
 
 permissions: # added using https://github.com/step-security/secure-workflows
   contents: read
@@ -207,7 +207,7 @@ jobs:
     strategy:
       matrix:
         os: [ubuntu-20.04, macos-12, windows-2019, windows-2022]
-        go-version: ["1.19.6", "1.18.10"]
+        go-version: ["1.20.1", "1.19.6"]
     steps:
       - uses: actions/setup-go@v3
         with: