CI: Update to gcc-13.1.0

As this is the current version of the public cross toolchains we use,
upgrade to this now.

Suggested-by: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
Acked-by: Alexey Brodkin <abrodkin@synopsys.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
diff --git a/tools/buildman/toolchain.py b/tools/buildman/toolchain.py
index 0ecd845..1001b61 100644
--- a/tools/buildman/toolchain.py
+++ b/tools/buildman/toolchain.py
@@ -499,7 +499,7 @@
         if arch == 'aarch64':
             arch = 'arm64'
         base = 'https://www.kernel.org/pub/tools/crosstool/files/bin'
-        versions = ['12.2.0', '11.1.0']
+        versions = ['13.1.0', '12.2.0']
         links = []
         for version in versions:
             url = '%s/%s/%s/' % (base, arch, version)