Change license of node-template and FRAME examples to MIT-0 (#13465)

* Change node-template license from Unlicense to MIT-0

* Change frame examples license from Unlicense to MIT-0

* Update bin/node-template/LICENSE

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Co-authored-by: Oliver Tale-Yazdi <oliver.tale-yazdi@parity.io>
Co-authored-by: parity-processbot <>

substrate/bin/node-template/node/Cargo.toml

@@ -5,7 +5,7 @@ description = "A fresh FRAME-based Substrate node, ready for hacking."
 authors = ["Substrate DevHub <https://github.com/substrate-developer-hub>"]
 homepage = "https://substrate.io/"
 edition = "2021"
-license = "Unlicense"
+license = "MIT-0"
 publish = false
 repository = "https://github.com/substrate-developer-hub/substrate-node-template/"
 build = "build.rs"