manifest: android-13.0.0_r6 -> android-13.0.0_r8

Change-Id: I20d5e4863abb8d1a2925c3269114865bac21d538
diff --git a/snippets/lineage.xml b/snippets/lineage.xml
index 8c344c0..ef6c294 100644
--- a/snippets/lineage.xml
+++ b/snippets/lineage.xml
@@ -61,7 +61,7 @@
   <project path="prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9" name="LineageOS/android_prebuilts_gcc_linux-x86_aarch64_aarch64-linux-android-4.9" groups="pdk,linux,arm" clone-depth="1" revision="lineage-19.1" />
   <project path="prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.9" name="LineageOS/android_prebuilts_gcc_linux-x86_arm_arm-linux-androideabi-4.9" groups="pdk,linux,arm" clone-depth="1" revision="lineage-19.1" />
   <project path="prebuilts/gcc/linux-x86/x86/x86_64-linux-android-4.9" name="LineageOS/android_prebuilts_gcc_linux-x86_x86_x86_64-linux-android-4.9" groups="pdk,linux,x86" clone-depth="1" revision="lineage-19.1" />
-  <project path="prebuilts/kernel-build-tools" name="kernel/prebuilts/build-tools" clone-depth="1" remote="aosp" revision="refs/tags/android-13.0.0_r0.15" />
+  <project path="prebuilts/kernel-build-tools" name="kernel/prebuilts/build-tools" clone-depth="1" remote="aosp" revision="refs/tags/android-13.0.0_r0.20" />
   <project path="prebuilts/tools-lineage" name="LineageOS/android_prebuilts_tools-lineage" clone-depth="1" />
   <project path="tools/extract-utils" name="LineageOS/android_tools_extract-utils" />
   <project path="vendor/crowdin" name="LineageOS/android_vendor_crowdin" />