perf(ci): skip full toolchain install for semconv check

The semconv job only needs Weaver (already installed by mise-action), but
'mise run' auto-installs every tool in .mise.toml first, compiling the
source-built cargo tools from scratch each run because that install falls
outside mise-action's Weaver-scoped cache.

Signed-off-by: Yordis Prieto <yordis.prieto@gmail.com>

Author: yordis

.github/workflows/ci-semconv.yml

@@ -32,4 +32,4 @@ jobs:
           install_args: ubi:open-telemetry/weaver
 
       - name: Check semconv registry and enforce naming policies
-        run: mise run semconv:check
+        run: mise run --skip-tools semconv:check