Use template rendering action for pr body

.github/workflows/release-pr-body.md

@@ -1,4 +1,4 @@
-`usmap v${{ inputs.version }}` release candidate
+`usmap v{{ .version }}` release candidate
 
 #### Pre-release checklist:
 - [ ] Review automated changes
@@ -10,12 +10,13 @@
 - [ ] Update `NEWS` if necessary
 - [ ] Run `devtools::release()` from this branch
 - [ ] Perform necessary CRAN verification release steps (see maintainer email)
+
 Wait for CRAN to publish package. If issues are reported, make changes in this PR and re-run `devtools::release()`.
 
 #### Post-release checklist:
-- [ ] `git tag v{{ $inputs.version }}`
+- [ ] `git tag v{{ .version }}`
 - [ ] `git push --tags`
-- [ ] Update `DESCRIPTION` and `NEWS.md` versions to `{{ $inputs.version }}.9000`
+- [ ] Update `DESCRIPTION` and `NEWS.md` versions to `{{ .version }}.9000`
 - [ ] Add release date of latest version to `NEWS.md`
   - Example `Released Monday, February 31, 2020.`
 - [ ] Commit changes with message `Prepare for next release`

.github/workflows/release.yaml

@@ -50,14 +50,21 @@ jobs:
           include: "NEWS.md"
           regex: false
 
+      - name: Render PR body
+        id: pr-body
+        uses: chuhlomin/render-template@v1
+        with:
+          template: .github/workflows/release-pr-body.md
+          vars: |
+            version: ${{ inputs.version }}
+
       - name: Open pull request
-        id: open-pr
         uses: peter-evans/create-pull-request@v5
         with:
           commit-message: "[automated] Prepare for ${{ inputs.version }} release"
           branch: release/${{ inputs.version }}
           title: Release version ${{ inputs.version }}
-          body-path: .github/workflows/release-pr-body.md
+          body: ${{ steps.pr-body.outputs.result }}
           reviewers: pdil
           assignees: pdil
           labels: release