doc: fix Zephyr SDK archive URL

Signed-off-by: Harm Berntsen <git@harmberntsen.nl>
diff --git a/doc/getting_started/installation_linux.rst b/doc/getting_started/installation_linux.rst
index 1f97f3a..7635b89 100644
--- a/doc/getting_started/installation_linux.rst
+++ b/doc/getting_started/installation_linux.rst
@@ -148,4 +148,4 @@
      EOF
 
 .. _Zephyr SDK archive:
-    https://zephyrproject.org/downloads/tools
+    https://www.zephyrproject.org/downloads#Zephyr_SDK_Tools