fi-0213: Renamed to same name {:#fi-0213}

When renaming an element with the @available argument renamed, the new name cannot be the same as the element's original name:

{% include “docs/reference/fidl/language/error-catalog/label/_bad.md” %}

{% includecode gerrit_repo="fuchsia/fuchsia" gerrit_path="tools/fidl/fidlc/tests/fidl/bad/fi-0213.test.fidl" exclude_regexp="\/\/ (Copyright 20|Use of|found in).*" %}

To fix the error, remove the renamed argument:

{% include “docs/reference/fidl/language/error-catalog/label/_good.md” %}

{% includecode gerrit_repo="fuchsia/fuchsia" gerrit_path="tools/fidl/fidlc/tests/fidl/good/fi-0213-a.test.fidl" exclude_regexp="\/\/ (Copyright 20|Use of|found in).*" %}

Alternatively, keep the renamed argument but choose a different name:

{% include “docs/reference/fidl/language/error-catalog/label/_good.md” %}

{% includecode gerrit_repo="fuchsia/fuchsia" gerrit_path="tools/fidl/fidlc/tests/fidl/good/fi-0213-b.test.fidl" exclude_regexp="\/\/ (Copyright 20|Use of|found in).*" %}

See FIDL versioning to learn more about versioning.