fix(cmd): Update CmdRepos description and usage in repos.go (#946)

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Reviewed-on: https://gitea.com/gitea/tea/pulls/946
Reviewed-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: Nicolas <bircni@icloud.com>
Co-committed-by: Nicolas <bircni@icloud.com>

docs/CLI.md

@@ -1065,7 +1065,7 @@ Delete users Organizations
 
 ## repos, repo
 
-Show repository details
+Manage repositories
 
 **--fields, -f**="": Comma-separated list of fields to print. Available values:
 			description,forks,id,name,owner,stars,ssh,updated,url,permission,type