fix: add required permissions for welcome action (#789)

This PR adds the required permissions for making comments on the issues
and pull requests

References:
-
https://github.com/jsonrainbow/json-schema/actions/runs/13372875791/job/37345272696#step:2:1
-
wow-actions/welcome#9 (comment)

.github/workflows/welcome.yml

@@ -7,6 +7,9 @@ on:
 jobs:
   run:
     runs-on: ubuntu-latest
+    permissions:
+      issues: write
+      pull-requests: write
     steps:
       - uses: wow-actions/welcome@v1
         with:

CHANGELOG.md

@@ -9,6 +9,9 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 - Welcome first time contributors ([#782](https://github.com/jsonrainbow/json-schema/pull/782))
 
+### Fixed
+- Add required permissions for welcome action ([#789](https://github.com/jsonrainbow/json-schema/pull/789))
+
 ### Changed
 - Used PHPStan's int-mask-of<T> type where applicable ([#779](https://github.com/jsonrainbow/json-schema/pull/779))
 - Fixed some PHPStan errors ([#781](https://github.com/jsonrainbow/json-schema/pull/781))