ci: fix indentation in snd-aloop module injection script

Correct the indentation in the sed command to maintain consistent formatting when injecting the snd-aloop module into modules.bzl

.github/workflows/build.yml

@@ -443,7 +443,7 @@ jobs:
               # Insert before the closing bracket of _COMMON_GKI_MODULES_LIST
               echo "snd-aloop injection: adding to module list"
               sed -i '/_COMMON_GKI_MODULES_LIST = \[/,/^[[:space:]]*\]/{/^[[:space:]]*\]$/i\    "sound/drivers/snd-aloop.ko",
-}' common/modules.bzl
+              }' common/modules.bzl
               if grep -q 'sound\/drivers\/snd-aloop.ko' common/modules.bzl; then
                 echo "Injected snd-aloop into common/modules.bzl"
               else