use ubuntu image to build docs. Fix CUDA CI tags.

.gitlab-ci.yml

@@ -44,7 +44,8 @@ typechecker:
     - nox --session testsuite-3.10
   tags:
     - docker
-    - cuda11
+    - cuda
+    - cudaComputeCapability6.1
 
 "testsuite-py3.13":
   extends: .testsuite-base
@@ -53,7 +54,7 @@ typechecker:
     - nox --session testsuite-3.13
 
 build-documentation:
-  extends: .nox-base
+  image: i10git.cs.fau.de:5005/pycodegen/pycodegen/nox:ubuntu24.04
   stage: "Documentation"
   needs: []
   script:
@@ -62,6 +63,8 @@ build-documentation:
     paths:
       - docs/build/html
     when: always
+  tags:
+     - docker
 
 pages:
   image: alpine:latest

docs/source/getting_started.md

@@ -299,7 +299,7 @@ Let's briefly take a look at the compiler options:
 :::{note}
 The above command requires that at least clang 18 and `libc++` are installed.
 On Ubuntu >= 24, you can install these via `apt-get install clang libc++-dev`.
-On older systems, install `clang-18` instead.
+On older systems, install `clang-18 libc++-18-dev` instead.
 :::
 
 After succesful compilation, running the executable should yield the following output: