Bump axios and @slack/webhook

Bumps [axios](https://github.com/axios/axios) to 1.6.7 and updates ancestor dependency [@slack/webhook](https://github.com/slackapi/node-slack-sdk). These dependencies need to be updated together.


Updates `axios` from 0.21.4 to 1.6.7
- [Release notes](https://github.com/axios/axios/releases)
- [Changelog](https://github.com/axios/axios/blob/v1.x/CHANGELOG.md)
- [Commits](axios/axios@v0.21.4...v1.6.7)

Updates `@slack/webhook` from 6.1.0 to 7.0.2
- [Release notes](https://github.com/slackapi/node-slack-sdk/releases)
- [Commits](https://github.com/slackapi/node-slack-sdk/compare/@slack/webhook@6.1.0...@slack/webhook@7.0.2)

---
updated-dependencies:
- dependency-name: axios
  dependency-type: indirect
- dependency-name: "@slack/webhook"
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <support@github.com>

package.json

@@ -31,7 +31,7 @@
   "dependencies": {
     "@actions/core": "^1.9.1",
     "@actions/github": "^5.0.3",
-    "@slack/webhook": "^6.1.0",
+    "@slack/webhook": "^7.0.2",
     "https-proxy-agent": "^5.0.1",
     "semver": "^7.5.2"
   },