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/lock.yml

@@ -1,6 +1,7 @@
 name: 'Lock Threads'
 
 on:
+  workflow_dispatch:
   schedule:
     - cron: '15 2/3 * * *'
 
@@ -10,7 +11,7 @@ jobs:
     steps:
       - uses: dessant/lock-threads@c1b35aecc5cdb1a34539d14196df55838bb2f836
         with:
-          github-token: ${{ secrets.GH_PAT_BOT }}
+          github-token: ${{ github.token }}
           issue-inactive-days: '7'
           issue-comment: >
             This thread has been automatically locked since there has not been