Add newer language options.

diff --git a/client/langs.go b/tmp/langs.go
index b09c69f..0695958 100644
--- a/client/langs.go
+++ b/tmp/langs.go
@@ -9,6 +9,7 @@ var Langs = map[string]string{
 	"42": "GNU G++11 5.1.0",
 	"50": "GNU G++14 6.4.0",
 	"54": "GNU G++17 7.3.0",
+	"89": "GNU G++20 13.2 (64 bit, winlibs)",
 	"2":  "Microsoft Visual C++ 2010",
 	"59": "Microsoft Visual C++ 2017",
 	"9":  "C# Mono 5.18",
@@ -60,6 +61,7 @@ var LangsExt = map[string]string{
 	"GNU C++11":             "cpp",
 	"GNU C++14":             "cpp",
 	"GNU C++17":             "cpp",
+	"GNU G++20":             "cpp",
 	"MS C++":                "cpp",
 	"MS C++ 2017":           "cpp",
 	"Mono C#":               "cs",
nge='this.form.submit();'>
<option value='koszko' selected='selected'>koszko</option>
<option value='koszko-scripts'>koszko-scripts</option>
</select> <input type='submit' value='switch'/></form></td></tr>
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<tr><td><span title='2024-08-28 16:37:32 +0200'>2024-08-28</span></td><td><a href='/guix/commit/gnu/services/mcron.scm?id=ebe00a20e2aea189b5c59d0550fd75ab58443ff8'>services: mcron: Fix home version not respecting user PATH variable.</a><span class='msg-avail'>...<span class='msg-tooltip'>Without this fix, deploying `home-mcron-service-type' will strip user's PATH
variable from it's environment. This means that, programs such as `notmuch',
which use hooks which usually invoke `notmuch' from path, would need to be
updated with full paths; which makes it very inconvenient to use.

* gnu/services/mcron.scm (mcron-shepherd-services): respect user PATH variable.

Change-Id: I104aa0a818ad6c3266b2b8f73a9609bfb36e314d
Signed-off-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Sergio Pastor Pérez</td></tr>