fix(entrypoint): use up-to-date set output command (#4)

* fix(entrypoint): use up-to-date set output command

See https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

* chore: bump version

---------

Co-authored-by: Leigh Oliver <leigh@leigholiver.com>

Author: neilime

README.md

@@ -7,7 +7,7 @@ Action to commit a file or directory to another repo using a deploy key.
 * Add the private key to your source repo as a secret
 * Add this action to your workflow:
 ```yaml
-uses: leigholiver/commit-with-deploy-key@v1.0.3
+uses: leigholiver/commit-with-deploy-key@v1.0.4
 with:
   source: build_output
   destination_folder: dist

VERSION

@@ -1 +1 @@
-v1.0.3
+v1.0.4

entrypoint.sh

@@ -48,5 +48,5 @@ git commit -m "${INPUT_COMMIT_MESSAGE}" || echo
 GIT_SSH_COMMAND=$GIT_SSH git push -u origin $INPUT_DESTINATION_BRANCH
 
 # output the commit hash
-echo "::set-output name=commit_hash::$(git rev-parse HEAD)"
+echo "commit_hash=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT
 exit 0