Update to TRH v1.1.0 (#27)

Use TRH `v1.1.0` for the action. This version of TRH introduces the
`keygen` subcommand, which separates the key management functionality
from the initialization step.

README.md

@@ -11,11 +11,10 @@ Update Client (TUC)](https://docs.thistle.tech/update/cli#update-client-usage).
 To use this action, one needs to create an account in the [Thistle Control
 Center](https://app.thistle.tech), and obtain the API token ("Project Access
 Token"). In case a locally managed OTA update signing key is used (which is the
-only supported option currently), one also needs to go through the
-[Configuration
-step](https://docs.thistle.tech/update/get_started/file_update#configuration) to
-create a password-protected [Minisign](https://jedisct1.github.io/minisign/)
-private key with the `trh init` command.
+only supported option currently), one needs run the `trh keygen` (requiring
+[TRH](https://docs.thistle.tech/download#thistle-update-client-tuc-and-release-helper-trh)
+v1.1.0 or above) command to create a password-protected
+[Minisign](https://jedisct1.github.io/minisign/) private key.
 
 An example workflow for [file
 update](https://docs.thistle.tech/update/get_started/file_update) is as follows.

entrypoint.sh

@@ -27,7 +27,7 @@ SCRIPT_DIR="$(cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"
 readonly SCRIPT_DIR
 TRH_BINARY_PATH="${SCRIPT_DIR}/trh"
 readonly TRH_BINARY_PATH
-TRH_DOWNLOAD_URL="https://downloads.thistle.tech/embedded-client/1.0.1/trh-1.0.1-x86_64-unknown-linux-musl.gz"
+TRH_DOWNLOAD_URL="https://downloads.thistle.tech/embedded-client/1.1.0/trh-1.1.0-x86_64-unknown-linux-musl.gz"
 readonly TRH_DOWNLOAD_URL
 
 # Set environment variables