unuran: add v1.11.0

[wdconinc]

This PR adds unuran, v1.11.0, unuran/unuran@unuran-1.8.1...unuran-1.11.0. No major changes (but fixes a bug in unuran/unuran@8cb1dc4).

==> No binary for unuran-1.11.0-blberzycfn7y5t57tpov6ccltznsar3f found: installing from source
==> Installing unuran-1.11.0-blberzycfn7y5t57tpov6ccltznsar3f [9/9]
==> Fetching https://statmath.wu.ac.at/unuran/unuran-1.11.0.tar.gz
    [100%]    3.82 MB @    1.3 MB/s
==> No patches needed for unuran
==> unuran: Executing phase: 'autoreconf'
==> unuran: Executing phase: 'configure'
==> unuran: Executing phase: 'build'
==> unuran: Executing phase: 'install'
==> Warning: unuran@1.11.0~gsl+rngstreams+shared build_system=autotools platform=linux os=ubuntu25.10 target=skylake/blberzy uses more than one compiler, and might not fit the LMod hierarchy. Using gcc@15.1.0~binutils+bootstrap~graphite~mold~nvptx~piclibs~profiled~strip build_system=autotools build_type=RelWithDebInfo languages:='c,c++,fortran' platform=linux os=ubuntu25.10 target=skylake/wffsqfd as the LMod compiler.
==> unuran: Successfully installed unuran-1.11.0-blberzycfn7y5t57tpov6ccltznsar3f
  Stage: 4.18s.  Autoreconf: 0.00s.  Configure: 6.26s.  Build: 30.24s.  Install: 0.71s.  Post-install: 0.14s.  Total: 41.60s
[+] /opt/software/linux-skylake/unuran-1.11.0-blberzycfn7y5t57tpov6ccltznsar3f

[tldahlgren]

Confirmed the git repository and version sha256.