fix: include release headings in pr body only if it has commits

lib/config/templates/default/pr-body.hbs

@@ -13,20 +13,24 @@ This PR also includes an upgrade to the corresponding [@types/{{{depName}}}](htt
 **Important**: Renovate will wait until you have merged this Pin request before creating PRs for any *upgrades*. If you do not wish to pin anything, please update your config accordingly instead of leaving this PR open.
 {{/if}}
 
+{{#if hasCommits}}
 ### Commits
 
 <details>
 <summary>{{githubName}}</summary>
 
 {{#each releases as |release|}}
+{{#if release.hasCommits}}
 #### {{release.version}}
 {{#each release.commits as |commit|}}
 -   [`{{commit.shortSha}}`]({{commit.url}}) {{commit.message}}
 {{/each}}
+{{/if}}
 {{/each}}
 
 </details>
 {{/if}}
+{{/if}}
 
 {{#if hasErrors}}
 

lib/workers/pr/index.js

@@ -115,6 +115,8 @@ async function ensurePr(prConfig) {
               release.commits.push(commit);
             });
           }
+          release.hasCommits = release.commits.length > 0;
+          upgrade.hasCommits = upgrade.hasCommits || release.hasCommits;
           upgrade.releases.push(release);
         });
       }