Update glean-parser requirement from ~=17.3.0 to ~=18.0.6

Updates the requirements on [glean-parser](https://github.com/mozilla/glean_parser) to permit the latest version.
- [Release notes](https://github.com/mozilla/glean_parser/releases)
- [Changelog](https://github.com/mozilla/glean_parser/blob/main/CHANGELOG.md)
- [Commits](mozilla/glean_parser@v17.3.0...v18.0.6)

---
updated-dependencies:
- dependency-name: glean-parser
  dependency-version: 18.0.6
  dependency-type: direct:production
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

requirements.txt

@@ -3,7 +3,7 @@ beautifulsoup4==4.8.2
 GitPython==3.1.41
 boto3==1.28.7
 Flask==2.3.3
-glean-parser~=17.3.0
+glean-parser~=18.0.6
 google-cloud-bigquery==3.23.1
 google-cloud-storage==2.2.1
 gsutil==5.28