Update getrandom to v0.3 in examples.#302

PiotrSikora merged 2 commits intoproxy-wasm:mainproxy-wasm/proxy-wasm-rust-sdk:mainfrom

PiotrSikora:getrandom_v0.3PiotrSikora/proxy-wasm-rust-sdk:getrandom_v0.3Copy head branch name to clipboard