chore: clarify "Mend Renovate" in PRs (#42841)

As part of general work to reinforce the brand link between Mend and
Renovate, we can improve the default PR body footer to clarify this.

This feeds into #29885 and general naming, where we want to keep these
close, while also not being too "in your face".

This is still user-controlled, but provides a more reasonable default.

This also feeds into #26838 and #39305, where we should also remove the
"Bot" from the footer.

Author: jamietanna

lib/config/options/index.ts

@@ -2472,7 +2472,7 @@ const options: Readonly<RenovateOptions>[] = [
     description:
       'Text added here will be placed last in the PR body, with a divider separator before it.',
     type: 'string',
-    default: `This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).`,
+    default: `This PR has been generated by [Mend Renovate](https://github.com/renovatebot/renovate).`,
   },
   {
     name: 'customizeDashboard',

lib/modules/platform/utils/__fixtures__/pr-body.txt

@@ -98,4 +98,4 @@ This PR contains the following updates:
 
 ---
 
-This PR has been generated by [Renovate Bot](https://togithub.com/marketplace/renovate). View repository job log [here](https://renovatebot.com/dashboard#VisualOn/docker-images).
+This PR has been generated by [Mend Renovate](https://togithub.com/marketplace/renovate). View repository job log [here](https://renovatebot.com/dashboard#VisualOn/docker-images).

lib/modules/platform/utils/__snapshots__/pr-body.spec.ts.snap

@@ -34,7 +34,7 @@ This PR contains the following updates:
 <details>
 <summary>renovatebot/renovate</summary>
 
-### [\`v19.47.0\`](
+### [\`v19.47.0\`]
 
 </details>
 
@@ -56,6 +56,6 @@ This PR contains the following updates:
 
 ---
 
-This PR has been generated by [Renovate Bot](https://togithub.com/marketplace/renovate). View repository job log [here](https://renovatebot.com/dashboard#VisualOn/docker-images).
+This PR has been generated by [Mend Renovate](https://togithub.com/marketplace/renovate). View repository job log [here](https://renovatebot.com/dashboard#VisualOn/docker-images).
 "
 `;

lib/workers/repository/config-migration/pr/__snapshots__/index.spec.ts.snap

@@ -16,7 +16,7 @@ exports[`workers/repository/config-migration/pr/index > ensureConfigMigrationPr(
 
 ---
 
-This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
+This PR has been generated by [Mend Renovate](https://github.com/renovatebot/renovate).
 "
 `;
 

lib/workers/repository/onboarding/pr/index.spec.ts

@@ -21,7 +21,7 @@ describe('workers/repository/onboarding/pr/index', () => {
     let branches: BranchConfig[];
 
     const bodyStruct = {
-      hash: 'ca7d8b2b5477b8db83231a2584c4e0a1748e4c19e26089507ee1447b8eeb6894',
+      hash: '3864212140a13f6ddfaf19c2c812187369a6b00e680a0ac443b4d23539317c41',
     };
 
     beforeEach(() => {
@@ -214,7 +214,7 @@ describe('workers/repository/onboarding/pr/index', () => {
         '(onboardingRebaseCheckbox="$onboardingRebaseCheckbox")',
       async ({ onboardingRebaseCheckbox }) => {
         const hash =
-          '16d923d407af84b1d00c4336c5dd88fc3cd0e6695b7e4e13debd02c7b8c4b60d'; // no rebase checkbox PR hash
+          '1280e47eeebf596351163aef6d1367d083276b37bcc97fb3b05c4b4312ef357a'; // no rebase checkbox PR hash
         config.onboardingRebaseCheckbox = onboardingRebaseCheckbox;
         OnboardingState.prUpdateRequested = true; // case 'false' is tested in "breaks early when onboarding"
         platform.getBranchPr.mockResolvedValue(