docs: fix italics

Author: Jose Diaz-Gonzalez

README.md

@@ -8,38 +8,38 @@ Please note that this action is compatible with `dokku >= 0.11.6`.
 
 ## Inputs
 
-- `branch`: (__optional__) The branch to deploy when pushing to Dokku. Useful when a [custom deploy branch](http://dokku.viewdocs.io/dokku/deployment/methods/git/#changing-the-deploy-branch) is set on Dokku.
+- `branch`: (_optional_) The branch to deploy when pushing to Dokku. Useful when a [custom deploy branch](http://dokku.viewdocs.io/dokku/deployment/methods/git/#changing-the-deploy-branch) is set on Dokku.
   - default: `master`
   - example value: `main`
 
-- `ci_branch_name`: (__optional__) The branch name that triggered the deploy. Automatically detected from `GITHUB_REF`.
+- `ci_branch_name`: (_optional_) The branch name that triggered the deploy. Automatically detected from `GITHUB_REF`.
   - example value: `develop`
 
-- `ci_commit`: (__optional__) The commit sha that will be pushed. Automatically detected from `GITHUB_SHA`.
+- `ci_commit`: (_optional_) The commit sha that will be pushed. Automatically detected from `GITHUB_SHA`.
   - example value: `0aa00d8dd7c971c121e3d1e471d0a35e1daf8abe`
 
-- `command`: (__optional__) The command to run for the action.
+- `command`: (_optional_) The command to run for the action.
   - default: deploy
   - valid values:
     - `deploy`
     - `review-apps:create`: Used to create a review app - via `dokku apps:clone` - based on the `appname` configured in the `git_remote_url`. If the review app already exists, this action will not recreate the app. In both cases, the current commit will be pushed to the review app.
     - `review-apps:destroy`: Destroys an existing review app.
 
-- `git_push_flags`: (__optional__) A string containing a set of flags to set on push. This may be used to enable force pushes, or trigger verbose log output from git.
+- `git_push_flags`: (_optional_) A string containing a set of flags to set on push. This may be used to enable force pushes, or trigger verbose log output from git.
   - example value: `--force -vvv`
 
-- `git_remote_url`: (**required**) The dokku app's git repository url **(in SSH format)**.
+- `git_remote_url`: (**required**) The dokku app's git repository url in SSH format.
   - required: true
   - example value: `ssh://dokku@dokku.myhost.ca:22/appname`
 
-- `review_app_name`: (__optional__) The name of the review app to create or destroy. Computed as `review-$APPNAME-$BRANCH_NAME` if not specified, where:
+- `review_app_name`: (_optional_) The name of the review app to create or destroy. Computed as `review-$APPNAME-$BRANCH_NAME` if not specified, where:
   ```text
   $APPNAME: The parsed app name from the `git_remote_url`
   $BRANCH_NAME: The inflected git branch name
   ```
   - example value: `review-appname`
 
-- `ssh_host_key`: (__optional__) The results of running `ssh-keyscan -t rsa $HOST`. The github-action will otherwise generate this on the fly via `ssh-keyscan`.
+- `ssh_host_key`: (_optional_) The results of running `ssh-keyscan -t rsa $HOST`. The github-action will otherwise generate this on the fly via `ssh-keyscan`.
   - example value:
     ```text
     # dokku.com:22 SSH-2.0-OpenSSH_8.2p1 Ubuntu-4ubuntu0.1