Switch logging service from log.tailscale.io to log.tailscale.com (#14398)

Updates tailscale/corp#23617

Signed-off-by: Joe Tsai <joetsai@digital-static.net>

logtail/example/logadopt/logadopt.go

@@ -25,7 +25,7 @@ func main() {
 	}
 	log.SetFlags(0)
 
-	req, err := http.NewRequest("POST", "https://log.tailscale.io/instances", strings.NewReader(url.Values{
+	req, err := http.NewRequest("POST", "https://log.tailscale.com/instances", strings.NewReader(url.Values{
 		"collection": []string{*collection},
 		"instances":  []string{*publicID},
 		"adopt":      []string{"true"},

logtail/example/logreprocess/demo.sh

@@ -13,7 +13,7 @@
 #
 # Then generate a LOGTAIL_API_KEY and two test collections by visiting:
 #
-#        https://log.tailscale.io
+#        https://log.tailscale.com
 #
 # Then set the three variables below.
 trap 'rv=$?; [ "$rv" = 0 ] || echo "-- exiting with code $rv"; exit $rv' EXIT

logtail/example/logreprocess/logreprocess.go

@@ -37,7 +37,7 @@ func main() {
 		}()
 	}
 
-	req, err := http.NewRequest("GET", "https://log.tailscale.io/c/"+*collection+"?stream=true", nil)
+	req, err := http.NewRequest("GET", "https://log.tailscale.com/c/"+*collection+"?stream=true", nil)
 	if err != nil {
 		log.Fatal(err)
 	}