fix: update vault to 1.20.3 (#459)

Author: sudermanjr

bin/install-rok8s-requirements

@@ -139,10 +139,10 @@ fi
 if ! hash vault 2>/dev/null; then
   echo Installing vault...
   cd "${ROK8S_INSTALL_PATH}"
-  curl -LO "https://releases.hashicorp.com/vault/1.14.4/vault_1.14.4_linux_amd64.zip"
-  echo "2e94ba5f3e6b361847763a4c4fba87050221e76f02c3a118605ec56155a7a3cf  vault_1.14.4_linux_amd64.zip" | sha256sum -c -
-  unzip vault_1.14.4_linux_amd64.zip
-  rm vault_1.14.4_linux_amd64.zip
+  curl -LO "https://releases.hashicorp.com/vault/1.20.3/vault_1.20.3_linux_amd64.zip"
+  echo "128d35b82bed319b8ce3caec99286a7d458342d8def5e6ca4d20cc7621df53d3  vault_1.20.3_linux_amd64.zip" | sha256sum -c -
+  unzip vault_1.20.3_linux_amd64.zip
+  rm vault_1.20.3_linux_amd64.zip
   chmod +x vault
 fi