llama-cpp: 6908 -> 6981 (#459678)

pkgs/by-name/ll/llama-cpp/package.nix

@@ -75,13 +75,13 @@ let
 in
 effectiveStdenv.mkDerivation (finalAttrs: {
   pname = "llama-cpp";
-  version = "6908";
+  version = "6981";
 
   src = fetchFromGitHub {
     owner = "ggml-org";
     repo = "llama.cpp";
     tag = "b${finalAttrs.version}";
-    hash = "sha256-7zgeVK1dQLFy9rm6VsaVK9/vIadMst+RNry5Vf7yk+A=";
+    hash = "sha256-0WtiHDlMeb+m2XcMwkPFY1mtwVTwRJUoxQSwzpiRbts=";
     leaveDotGit = true;
     postFetch = ''
       git -C "$out" rev-parse --short HEAD > $out/COMMIT