fix(docs): Update invalid xrefs in stackablectl docs (#115)

Author: Techassi

docs/modules/stackablectl/pages/index.adoc

@@ -51,4 +51,4 @@ Demos are installed with the xref:commands/demo.adoc[`demo`] command. A demo nee
 depends on a stack, which gets automatically installed when a demo is installed. The stack, in turn, will install the
 needed Stackable release.
 
-You can browse the available demos on the xref:demos:index.adoc[demo] page.
+You can browse the available demos on the xref:home:demos:index.adoc[demo] page.

docs/modules/stackablectl/pages/quickstart.adoc

@@ -32,7 +32,7 @@ When you are on a Windows system you have to replace the `stackablectl` command
 `stackablectl.exe demo list`. This applies to all commands below.
 ====
 
-For this guide, we will use the xref:demos:trino-taxi-data.adoc[] demo. The installation of other available demos
+For this guide, we will use the xref:home:demos:trino-taxi-data.adoc[] demo. The installation of other available demos
 should work the same way. You need to use the name of the chosen demo instead of `trino-taxi-data` in the following
 commands.
 
@@ -101,4 +101,4 @@ down.
 
 == Proceed with the Demo
 
-Please read the documentation on the demo xref:demos:trino-taxi-data.adoc[] on how to proceed with the demo.
+Please read the documentation on the demo xref:home:demos:trino-taxi-data.adoc[] on how to proceed with the demo.