tezos-webassembly-interpreter: format license according to SPDX standard

Author: pirbo

packages/tezos-webassembly-interpreter/tezos-webassembly-interpreter.14.0/opam

@@ -4,7 +4,7 @@ authors: ["Tezos devteam" "WebAssembly Authors"]
 homepage: "https://www.tezos.com/"
 bug-reports: "https://gitlab.com/tezos/tezos/issues"
 dev-repo: "git+https://gitlab.com/tezos/tezos.git"
-license: "Apache License 2.0"
+license: "Apache-2.0"
 depends: [
   "dune" { >= "3.0" }
   "tezos-lwt-result-stdlib" { = version }