Doc rename file and page since alpha will be a ind. cluster

doc.zih.tu-dresden.de/docs/jobs_and_resources/alpha_centauri.md

-# Alpha Centauri
+# GPU Cluster Alpha Centauri
 
 The multi-GPU sub-cluster "Alpha Centauri" has been installed for AI-related computations (ScaDS.AI).
 
 The hardware specification is documented on the page
-[HPC Resources](hardware_overview.md#amd-rome-cpus-nvidia-a100).
+[HPC Resources](hardware_overview.md#alpha-centauri).
 
 ## Usage
 

doc.zih.tu-dresden.de/mkdocs.yml

@@ -106,7 +106,7 @@ nav:
         - "How-To: Migration to Barnard": jobs_and_resources/migration_to_barnard.md
       - CPU Custer Romeo: jobs_and_resources/romeo.md
       - NVMe Storage: jobs_and_resources/nvme_storage.md
-      - Alpha Centauri: jobs_and_resources/alpha_centauri.md
+      - GPU Cluster Alpha Centauri: jobs_and_resources/alpha_centauri.md
       - HPE Superdome Flex: jobs_and_resources/sd_flex.md
       - NVIDIA Arm HPC Developer Kit: jobs_and_resources/arm_hpc_devkit.md
     - Running Jobs: