Update dependency gatsby-plugin-advanced-sitemap to ^1.5.4

Created by: renovate[bot]

This PR contains the following updates:

Package	Type	Update	New value	References	Sourcegraph
gatsby-plugin-advanced-sitemap (source)	dependencies	minor	^1.5.4	homepage, source

---

Release Notes

tryghost/gatsby-plugin-advanced-sitemap

v1.5.4

Compare Source

v1.5.3

Compare Source

v1.5.2

Compare Source

v1.5.1

Compare Source

v1.5.0

Compare Source

---

Renovate configuration

📅 Schedule: "on the 1st through 7th day of the month" in timezone America/Los_Angeles.

🚦 Automerge: Disabled by config. Please merge this manually once you are satisfied.

♻ Rebasing: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

🔕 Ignore: Close this PR and you won't be reminded about this update again.

---

• If you want to rebase/retry this PR, check this box

---

This PR has been generated by WhiteSource Renovate. View repository job log here.