internal: remove deprecated metrics (#7540)

Signed-off-by: Jens Langhammer <jens@goauthentik.io>

website/docs/releases/2024/v2024.1.md

@@ -0,0 +1,52 @@
+---
+title: Release 2024.1
+slug: "/releases/2024.1"
+---
+
+## Breaking changes
+
+-   Removal of deprecated metrics
+
+    -   `authentik_outpost_flow_timing_get` -> `authentik_outpost_flow_timing_get_seconds`
+    -   `authentik_outpost_flow_timing_post` -> `authentik_outpost_flow_timing_post_seconds`
+    -   `authentik_outpost_ldap_requests` -> `authentik_outpost_ldap_request_duration_seconds`
+    -   `authentik_outpost_ldap_requests_rejected` -> `authentik_outpost_ldap_requests_rejected_total`
+    -   `authentik_outpost_proxy_requests` -> `authentik_outpost_proxy_request_duration_seconds`
+    -   `authentik_outpost_proxy_upstream_time` -> `authentik_outpost_proxy_upstream_response_duration_seconds`
+    -   `authentik_outpost_radius_requests` -> `authentik_outpost_radius_request_duration_seconds`
+    -   `authentik_outpost_radius_requests_rejected` -> `authentik_outpost_radius_requests_rejected_total`
+    -   `authentik_main_requests` -> `authentik_main_request_duration_seconds`
+
+## New features
+
+## Upgrading
+
+This release does not introduce any new requirements.
+
+### docker-compose
+
+To upgrade, download the new docker-compose file and update the Docker stack with the new version, using these commands:
+
+```
+wget -O docker-compose.yml https://goauthentik.io/version/2024.1/docker-compose.yml
+docker-compose up -d
+```
+
+The `-O` flag retains the downloaded file's name, overwriting any existing local file with the same name.
+
+### Kubernetes
+
+Upgrade the Helm Chart to the new version, using the following commands:
+
+```shell
+helm repo update
+helm upgrade authentik authentik/authentik -f values.yaml --version ^2024.1
+```
+
+## Minor changes/fixes
+
+<!-- _Insert the output of `make gen-changelog` here_ -->
+
+## API Changes
+
+<!-- _Insert output of `make gen-diff` here_ -->