docs(readme): add #inheritance install option to the Install section (EN/ES)

Also refresh the pinning example to the current release tag.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

Author: gtrabanco

README.es.md

@@ -345,8 +345,12 @@ npx skills list
 npx skills update
 npx skills remove plan-feature
 
+# Sin fijar modelos — cada skill hereda el modelo y esfuerzo de TU sesión
+# (mismas skills, auto-sincronizada con latest; ideal para agentes no-Claude):
+npx skills add gtrabanco/agentic-workflow#inheritance
+
 # Pinear una versión: instala desde un release etiquetado (o cualquier tag/rama) con #<ref>:
-npx skills add gtrabanco/agentic-workflow#release-2026-06-19
+npx skills add gtrabanco/agentic-workflow#release-2026-07-02
 #   …luego `npx skills experimental_install` restaura el conjunto exacto desde skills-lock.json.
 #   Ver CHANGELOG.es.md → "Instalar y pinear una versión" para cómo funciona el pinning.
 ```

README.md

@@ -334,8 +334,12 @@ npx skills list
 npx skills update
 npx skills remove plan-feature
 
+# No model pinning — every skill inherits YOUR session's model and effort
+# (same skills, auto-synced to latest; ideal for non-Claude agents):
+npx skills add gtrabanco/agentic-workflow#inheritance
+
 # Pin a version: install from a tagged release (or any tag/branch) with #<ref>:
-npx skills add gtrabanco/agentic-workflow#release-2026-06-19
+npx skills add gtrabanco/agentic-workflow#release-2026-07-02
 #   …then `npx skills experimental_install` restores the exact set from skills-lock.json.
 #   See CHANGELOG.md → "Installing & pinning a version" for how pinning works.
 ```