chore: add .cargo/config.toml for Nix builds

.cargo/config.toml

@@ -0,0 +1,5 @@
+[source.crates-io]
+replace-with = "tuna"
+
+[source.tuna]
+registry = "sparse+https://mirrors.tuna.tsinghua.edu.cn/crates.io-index/"

Cargo.lock

@@ -936,7 +936,7 @@ dependencies = [
 
 [[package]]
 name = "newsboard"
-version = "0.1.1"
+version = "0.1.0"
 dependencies = [
  "axum",
  "chrono",

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "newsboard"
-version = "0.1.1"
+version = "0.1.0"
 edition = "2021"
 
 [dependencies]