linux: 5.15.6 -> 5.15.7

pkgs/os-specific/linux/kernel/linux-5.15.nix

@@ -3,7 +3,7 @@
 with lib;
 
 buildLinux (args // rec {
-  version = "5.15.6";
+  version = "5.15.7";
 
   # modDirVersion needs to be x.y.z, will automatically add .0 if needed
   modDirVersion = if (modDirVersionArg == null) then concatStringsSep "." (take 3 (splitVersion "${version}.0")) else modDirVersionArg;
@@ -13,6 +13,6 @@ buildLinux (args // rec {
 
   src = fetchurl {
     url = "mirror://kernel/linux/kernel/v5.x/linux-${version}.tar.xz";
-    sha256 = "1w0plw9rzk2c0g8yxzwj7c6wkq538sy56mx1skmf58wrl83bmsdk";
+    sha256 = "1caxpqmik6gkhk3437pcgfq6vvlbs962hylgbh64iizd76l5142x";
   };
 } // (args.argsOverride or { }))