nvk+zink/ci/ga106: make the expectations codename-specific

CI expectations are definitely not portable across different gpu
families, so let's tag them as such to reduce confusion and be more
in line with the rest of the codebase.

Signed-off-by: Martin Roukala (né Peres) <martin.roukala@mupuf.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/29381>

src/gallium/drivers/zink/ci/gitlab-ci.yml

@@ -147,7 +147,7 @@ zink-nvk-ga106-valve:
     - .zink-nvk-manual-rules
     - .nvk-ga106-valve
   variables:
-    GPU_VERSION: zink-nvk
+    GPU_VERSION: zink-nvk-ga106
     B2C_TIMEOUT_BOOT_MINUTES: 35
     B2C_TIMEOUT_OVERALL_MINUTES: 40  # usual run time: 26min