fix: improve script

Author: tomalaforge

.github/github-action/index.js

@@ -19,14 +19,13 @@ async function run() {
 
  const githubToken = core.getInput('github_token');
 
- const [owner, repo] = core.getInput('repo').split('/');
- const number = github.context.issue.number;
+ const number = github.context.payload.pull_request.number;
 
  const octokit = github.getOctokit(githubToken);
  await octokit.rest.issues.addLabels({
  labels,
- owner,
- repo,
+ owner: github.context.repo.owner,
+ repo: github.context.repo.repo,
  issue_number: number
  });
  } catch (e) {