Update Arch kernel to 5.12.8

pkg/arch/kernel/PKGBUILD

@@ -2,7 +2,7 @@
 # Maintainer: Jan Alexander Steffens (heftig) <jan.steffens@gmail.com>
 
 pkgbase=linux-surface
-pkgver=5.12.6.arch1
+pkgver=5.12.8.arch1
 pkgrel=1
 pkgdesc='Linux'
 _shortver=${pkgver%.*}
@@ -41,7 +41,7 @@ validpgpkeys=(
   '647F28654894E3BD457199BE38DBBDC86092693E'  # Greg Kroah-Hartman
   'A2FF3A36AAA56654109064AB19802F8B0D70FC30'  # Jan Alexander Steffens (heftig)
 )
-sha256sums=('03b4254134b18756794d740c7e889d70207fb34c6431fea966ab8915c901118a'
+sha256sums=('5a0f699d131a108cfa686152fe831d90f85b2aa634075e0c3be87556790500ce'
             '55c4cb76754b1db234a0994806106d8481c171d4e3fead12793f0083a48511d4'
             '252c7a78ffb1efe9751aabc93cc79031ef69dbc95baa7970cbaabcd5474fe7d8'
             '9474de18769968c5558fedda5be354fe0babf1365541d4d0ac8e1ac47d4bbb88'