Wrap the tf plan output so it is more readable in the PR (#10)

* Wrap the tf plan output so it is more readable in the PR

* Remove extra period.

Co-authored-by: Matthew Sanabria <24284972+sudomateo@users.noreply.github.com>

Co-authored-by: Matthew Sanabria <24284972+sudomateo@users.noreply.github.com>

README.md

@@ -92,15 +92,17 @@ steps:
 - uses: actions/github-script@0.9.0
   if: github.event_name == 'pull_request'
   env:
-    STDOUT: "```${{ steps.plan.outputs.stdout }}```"
+    STDOUT: "```terraform\n${{ steps.plan.outputs.stdout }}```"
   with:
     github-token: ${{ secrets.GITHUB_TOKEN }}
     script: |
+      const output = `<details><summary>tf plan:</summary>\n\n${process.env.STDOUT}\n\n</details>`;
+
       github.issues.createComment({
         issue_number: context.issue.number,
         owner: context.repo.owner,
         repo: context.repo.repo,
-        body: process.env.STDOUT
+        body: output
       })
 ```
 
@@ -124,7 +126,7 @@ This action does not configure any outputs directly. However, when the `terrafor
 
 - `stderr` - The STDERR stream of the call to the `terraform` binary.
 
-- `exitcode` - The exit code of the call to the `terraform` binary.. 
+- `exitcode` - The exit code of the call to the `terraform` binary.
 
 ## License