Fix various typos (#18219)

Found via `codespell -q 3 -S ./options/locale,./vendor -L ba,pullrequest,pullrequests,readby,te,unknwon`

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>

routers/private/hook_pre_receive.go

@@ -404,7 +404,7 @@ func preReceivePullRequest(ctx *preReceiveContext, oldCommitID, newCommitID, ref
 
 	if ctx.opts.IsWiki {
 		ctx.JSON(http.StatusForbidden, map[string]interface{}{
-			"err": "Pull requests are not suppported on the wiki.",
+			"err": "Pull requests are not supported on the wiki.",
 		})
 		return
 	}