Fixes links in data_analytics_with_r

doc.zih.tu-dresden.de/docs/software/data_analytics_with_r.md

@@ -62,8 +62,8 @@ marie@compute$ R -e 'install.packages("ggplot2")'
 
 The deep learning frameworks perform extremely fast when run on accelerators such as GPU.
 Therefore, using nodes with built-in GPUs, e.g., clusters
-[`Capella`](../jobs_and_resources/capella.md),
-[`Alpha`](../jobs_and_resources/alpha_centauri.md) and
+[`Capella`](../jobs_and_resources/hardware_overview.md#capella),
+[`Alpha`](../jobs_and_resources/hardware_overview.md#alpha_centauri) and
 [`Power9`](../jobs_and_resources/hardware_overview.md) is beneficial for the examples here.
 
 ### R Interface to TensorFlow