fix(patch): fix syntax err

Signed-off-by: kaeeraa <kaeeraa@nebula-nook.ru>

Author: kaeeraa

unwrapped.nix

@@ -55,7 +55,7 @@ stdenv.mkDerivation (finalAttrs: {
   patches = [
     ./patch/cstring.patch
     # Fixes linux builds
-    (fecthpatch {
+    (fetchpatch {
       url = "https://github.com/AyuGram/AyuGramDesktop/pull/32/commits/15287ad6ed162c209d9772fc592e959d793f63b9";
       hash = "sha256-a3Mf+GcyS+dYritbqRpd9sFDpw/cXRA2Uv06+gac5mU=";
     })