fix broken links after renaming energy_est -> acdsim

_data/news.yml

@@ -10,7 +10,7 @@ news:
     text: |
       Matheus and Jonas have won first and third place in the graduate category
       of the [SOSP student research competition](https://sosp2023.mpi-sws.org/cfsrc.html)
-      for [Virtuoso](/projects/virtuoso.html) and [AC/DSim](/projects/energy_est.html)
+      for [Virtuoso](/projects/virtuoso.html) and [AC/DSim](/projects/acdsim.html)
       respectively.
   - date: 2023-10-20
     text: |
@@ -20,7 +20,7 @@ news:
       Matheus and Jonas have both passed the first round of the SOSP student
       research competition and will present posters on
       [Virtuoso](/projects/virtuoso.html) and
-      [AC/DSim](/projects/energy_est.html)!
+      [AC/DSim](/projects/acdsim.html)!
   - date: 2023-07-14
     text: |
       [Blueprint](/projects/blueprint.html) was accepted at SOSP'23. Vaastav