Update overview.md

doc.zih.tu-dresden.de/docs/application/overview.md

@@ -15,9 +15,9 @@
 ## NHR-center
 In order to use the HPC systems installed at ZIH, it is necessary to apply for the resources.
 The applicant (HPC project manager) is required to have a doctorate/PhD.  
-It is possible to apply to different [project types](/project_request_form.md) depending on the project requirements. 
+It is possible to apply to different [project types](./project_request_form.md) depending on the project requirements. 
 
-However, the [application workflow](/doc.zih.tu-dresden.de/docs/application/project_request_form.md) is for all types identical.
+However, the [application workflow](./project_request_form.md) is for all types identical.
 
 Since 2021, HPC at universities has been restructured by the [NHR network](https://www.nhr-verein.de/).
 The network consists of nine centers, which operate the systems and offer