fix: shellcheck warning in spdx-headers.sh

*/init.test.sys_class_net/* stood beside *.test.*, which already matches
it - those fixture paths contain ".test." as well. Same change in all
four copies.

Signed-off-by: Simon Walz <contact@simonwalz.de>

Author: simonwalz

.github/scripts/spdx-headers.sh

@@ -95,9 +95,10 @@ in_scope() {
     *.test.sh) return 0 ;;
   esac
   # Test fixtures: never touch, whatever the extension. A header could change
-  # what a test compares.
+  # what a test compares. This also covers the fixture directories, whose paths
+  # contain ".test." as well - init.test.sys_class_net/eth0/address and the like.
   case "${file}" in
-    *.test.*|*/init.test.sys_class_net/*) return 1 ;;
+    *.test.*) return 1 ;;
   esac
 
   case "${file}" in