Update broken office hours links

Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>

docs/overview/roadmap.md

@@ -55,4 +55,4 @@ guidelines to get started.
 
 If you have specific questions about the roadmap, please create an
 [issue](https://github.com/backstage/backstage/issues/new/choose), ping us on
-[Discord](https://discord.gg/backstage-687207715902193673), or [book time](https://info.backstage.spotify.com/office-hours) with the Spotify team.
+[Discord](https://discord.gg/backstage-687207715902193673), or [book time](https://spoti.fi/backstageofficehours) with the Spotify team.

microsite/blog/2023-06-21-switching-out-sandbox.mdx

@@ -71,4 +71,4 @@ This change comes with the v1.15.0 release of Backstage that was released yester
 
 For more guidance on how to upgrade, check out the documentation for [keeping Backstage updated](https://backstage.io/docs/getting-started/keeping-backstage-updated).
 
-If you have any further questions you can either reach out to us in the [Community Discord](https://discord.gg/backstage-687207715902193673), or in the [office hours](https://info.backstage.spotify.com/office-hours).
+If you have any further questions you can either reach out to us in the [Community Discord](https://discord.gg/backstage-687207715902193673), or in the [office hours](https://spoti.fi/backstageofficehours).

microsite/blog/2023-09-29-chicago-traiding-company-adopter-spotlight.mdx

@@ -57,4 +57,4 @@ Finally, don't be afraid to step outside the core use cases when it comes to the
 
 Interested in more stories from Backstage adopters? Check out these recent posts from [Stash](https://backstage.io/blog/2023/07/08/stash-adopter-post) and [Expedia Group](https://backstage.io/blog/2023/08/17/expedia-proof-of-value-metrics-2).
 
-Want to learn more about Backstage? Join our weekly [Office Hours](https://info.backstage.spotify.com/office-hours) and bring your burning questions.
+Want to learn more about Backstage? Join our weekly [Office Hours](https://spoti.fi/backstageofficehours) and bring your burning questions.

microsite/src/pages/home/_home.tsx

@@ -84,7 +84,7 @@ const HomePage = () => {
                   label: 'GITHUB',
                 },
                 {
-                  link: 'https://info.backstage.spotify.com/office-hours',
+                  link: 'https://spoti.fi/backstageofficehours',
                   label: 'OFFICE HOURS',
                 },
               ]}