Update body documentation in readme

README.md

@@ -19,7 +19,7 @@ This action will create a GitHub release and optionally upload an artifact to it
 | artifactErrorsFailBuild    | An optional flag which indicates if artifact read or upload errors should fail the build.                                                                                                                                                                                                   | false      | ""                   |
 | artifacts                  | An optional set of paths representing artifacts to upload to the release. This may be a single path or a comma delimited list of paths (or globs)                                                                                                                                           | false      | ""                   |
 | artifactContentType        | The content type of the artifact. Defaults to raw                                                                                                                                                                                                                                           | false      | ""                   |
-| body                       | An optional body for the release.                                                                                                                                                                                                                                                           | false      | ""                   |
+| body                       | An optional body for the release. Note: This input will have white space trimmed before and after it. Use `bodyFile` if you need a non-trivial markdown body.                                                                                                                               | false      | ""                   |
 | bodyFile                   | An optional body file for the release. This should be the path to the file.                                                                                                                                                                                                                 | false      | ""                   |
 | commit                     | An optional commit reference. This will be used to create the tag if it does not exist.                                                                                                                                                                                                     | false      | ""                   |
 | discussionCategory         | When provided this will generate a discussion of the specified category. The category must exist otherwise this will cause the action to fail. This isn't used with draft releases. The default "Announcements" category is not supported via the API and will cause an error if used here. | false      | ""                   |