chore: bump nixfmt version

Author: wenkokke

scripts/dev-dependencies.txt

@@ -5,7 +5,7 @@ fourmolu=0.16.2.0
 ghc=9.8.4
 haddock=2.31.0
 hlint=3.10
-nixfmt=1.0.1
+nixfmt=1.1.0
 prettier=3.4.1
 shellcheck=0.10.0
 protoc=29.3