fix: workflow fixes and vanitygen rebrand

Workflows:
- lock.yml: GH_PAT_BOT → github.token
- chain-endpoints.yml: repo name polkadot-js/apps → pezkuwichain/pezkuwi-apps
- test-nightly.yml: add 120min timeout
- auto-approve.yml: update token and authors
- auto-merge.yml: update token

Dependencies:
- @polkadot/vanitygen → @pezkuwi/vanitygen

.github/workflows/test-nightly.yml

@@ -1,5 +1,6 @@
 name: Nightly tests run
 on:
+  workflow_dispatch:
   schedule:
     - cron:  '1 5 * * *'
 
@@ -11,6 +12,7 @@ jobs:
         step: ['test:all']
     name: ${{ matrix.step }}
     runs-on: ubuntu-latest
+    timeout-minutes: 120
     steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-node@v4