⬆️ Bump certbot-dns-cloudflare from 1.12.0 to 1.13.0 in /proxy-manager (#166)

Bumps [certbot-dns-cloudflare](https://github.com/certbot/certbot) from 1.12.0 to 1.13.0.
- [Release notes](https://github.com/certbot/certbot/releases)
- [Commits](certbot/certbot@v1.12.0...v1.13.0)

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

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

proxy-manager/requirements.txt

@@ -1 +1 @@
-certbot-dns-cloudflare==1.12.0
+certbot-dns-cloudflare==1.13.0