Ubuntu.md: update for Go 1.22

Go 1.22 has been added to the Ubuntu PPA.

Change-Id: I81df57dd6c69578a21a6a08981f726feef09ce9f
Reviewed-on: https://go-review.googlesource.com/c/wiki/+/569555
Commit-Queue: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
Auto-Submit: Ian Lance Taylor <iant@golang.org>
diff --git a/Ubuntu.md b/Ubuntu.md
index fc4cd5a..d04dfdd 100644
--- a/Ubuntu.md
+++ b/Ubuntu.md
@@ -10,7 +10,7 @@
 
 ## Using PPA
 
-If you're using Ubuntu 18.04, 20.04 or 22.04 (amd64, arm64 or armhf), then you can use the [longsleep/golang-backports PPA](https://launchpad.net/~longsleep/+archive/ubuntu/golang-backports) and update to Go 1.21.
+If you're using Ubuntu 18.04, 20.04 or 22.04 (amd64, arm64 or armhf), then you can use the [longsleep/golang-backports PPA](https://launchpad.net/~longsleep/+archive/ubuntu/golang-backports) and update to Go 1.22.
 
 ```
 sudo add-apt-repository ppa:longsleep/golang-backports
@@ -18,7 +18,7 @@
 sudo apt install golang-go
 ```
 
-> **Note that `golang-go` installs latest Go as default Go. If you do not want that, install `golang-1.21` instead and use the binaries from `/usr/lib/go-1.21/bin`.**
+> **Note that `golang-go` installs latest Go as default Go. If you do not want that, install `golang-1.22` instead and use the binaries from `/usr/lib/go-1.22/bin`.**
 
 ## Using snap
 
@@ -27,4 +27,5 @@
 ```
 sudo snap install --classic go
 ```
+
 > A restart may or may not be required for the command to be recognized depending on your system.