[v11.5.x] Docs: What's new & Upgrade guide v11.5 (#99676)

Co-authored-by: Jack Baldry <jack.baldry@grafana.com>
Co-authored-by: Robby Milo <robbymilo@fastmail.com>
Co-authored-by: Isabel Matwawana <76437239+imatwawana@users.noreply.github.com>
Co-authored-by: Isabel Matwawana <isabel.matwawana@grafana.com>
Co-authored-by: Jacob Valdez <jacob.valdez@grafana.com>

docs/sources/upgrade-guide/upgrade-v11.5/index.md

@@ -0,0 +1,22 @@
+---
+description: Guide for upgrading to Grafana v11.5
+keywords:
+  - grafana
+  - configuration
+  - documentation
+  - upgrade
+  - '11.5'
+title: Upgrade to Grafana v11.5
+menuTitle: Upgrade to v11.5
+weight: 700
+---
+
+# Upgrade to Grafana v11.5
+
+{{< docs/shared lookup="upgrade/intro.md" source="grafana" version="<GRAFANA_VERSION>" >}}
+
+{{< docs/shared lookup="back-up/back-up-grafana.md" source="grafana" version="<GRAFANA_VERSION>" leveloffset="+1" >}}
+
+{{< docs/shared lookup="upgrade/upgrade-common-tasks.md" source="grafana" version="<GRAFANA_VERSION>" >}}
+
+## Technical notes