deps: bump to go1.20

[chenrui333]

Bump to use the latest go, go1.20

go1.20 release notes, https://tip.golang.org/doc/go1.20

[chenrui333]

Failed to delete archive error

Downloading https://github.com/golangci/golangci-lint/releases/download/v1.50.1/golangci-lint-1.50.1-linux-amd64.tar.gz ...
  ##[debug]Downloading https://github.com/golangci/golangci-lint/releases/download/v1.50.1/golangci-lint-1.50.1-linux-amd64.tar.gz
  ##[debug]Destination /home/runner/work/_temp/168df4ae-4486-4da4-a281-88022e6830b5
  ##[debug]*** zstd command line interface 64-bits v1.5.2, by Yann Collet ***
  ##[debug]Resource Url: https://artifactcache.actions.githubusercontent.com/Tf7QJul0Nw3SXINzvY3RGgBhvqOqGnkOhhh6X5lPFUqRTxwsc9/_apis/artifactcache/cache?keys=golangci-lint.cache-2770-a915ff4c1602c42a2fc7916eef63c99a0869fdee%2Cgolangci-lint.cache-2770-&version=0f79570b790d0689c186c2d92be94cb909971c6643d[39](https://github.com/terraform-linters/tflint/actions/runs/4072370844/jobs/7015194524#step:4:40)8173c3c5a0ecd5cf601
  ##[debug]Resource Url: https://artifactcache.actions.githubusercontent.com/Tf7QJul0Nw3SXINzvY3RGgBhvqOqGnkOhhh6X5lPFUqRTxwsc9/_apis/artifactcache/caches?key=golangci-lint.cache-2770-a915ff4c1602c42a2fc7916eef63c99a0869fdee
  ##[debug]Failed to delete archive: Error: ENOENT: no such file or directory, unlink ''
  Cache not found for input keys: golangci-lint.cache-2770-a915ff4c1602c[42](https://github.com/terraform-linters/tflint/actions/runs/4072370844/jobs/7015194524#step:4:43)a2fc7916eef63c99a0869fdee, golangci-lint.cache-2770-

[chenrui333]

lint issue relates to this

[wata727]

golangci-lint v1.51 adds support for Go 1.20. golangci/golangci-lint#3414
CI may succeed if you update to v1.51 or later.