[openwrt/openwrt] ci: add missing permission to add comments

[LEDE Commits]

aparcar pushed a commit to openwrt/openwrt.git, branch main:
https://git.openwrt.org/d3324aa20841bc4bf93ed6ddd9890bc2a923f042

commit d3324aa20841bc4bf93ed6ddd9890bc2a923f042
Author: Paul Spooren <mail at aparcar.org>
AuthorDate: Tue Jun 24 16:29:05 2025 +0200

    ci: add missing permission to add comments
    
    While this worked during testing, the repository of a organization requires
    extra permissions. Add write access to pull requests, like we do over at
    packages.git.
    
    Signed-off-by: Paul Spooren <mail at aparcar.org>
---
 .github/workflows/build-on-comment.yml | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/.github/workflows/build-on-comment.yml b/.github/workflows/build-on-comment.yml
index ffb20d1f23..cbce8afe17 100644
--- a/.github/workflows/build-on-comment.yml
+++ b/.github/workflows/build-on-comment.yml
@@ -4,6 +4,9 @@ on:
   issue_comment:
     types: [created, edited]
 
+permissions:
+  pull-requests: write
+
 concurrency:
   group: build-on-comment-${{ github.event.issue.number || github.event.pull_request.number }}
   cancel-in-progress: true