lib: cockpit-components-listing: Fix PropTypes for initiallyActiveTab
lib: cockpit-components-listing: Fix PropTypes for initiallyActiveTab

initallyActiveTab is the index of the tab to have initially active and
it should be a number instead of a bool.

Fixes #10176
Closes #10196

andreasn/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,moraleslazaro/cockpit,cockpituous/cockpit,cockpituous/cockpit,moraleslazaro/cockpit,garrett/cockpit,martinpitt/cockpit,deryni/cockpit,garrett/cockpit,cockpit-project/cockpit,moraleslazaro/cockpit,martinpitt/cockpit,mvollmer/cockpit,deryni/cockpit,mvollmer/cockpit,garrett/cockpit,martinpitt/cockpit,cockpit-project/cockpit,andreasn/cockpit,cockpituous/cockpit,andreasn/cockpit,deryni/cockpit,cockpit-project/cockpit,deryni/cockpit,garrett/cockpit,cockpit-project/cockpit,deryni/cockpit,andreasn/cockpit,andreasn/cockpit,deryni/cockpit,cockpit-project/cockpit,moraleslazaro/cockpit,mvollmer/cockpit,moraleslazaro/cockpit,andreasn/cockpit,mvollmer/cockpit,garrett/cockpit,cockpituous/cockpit,deryni/cockpit,cockpituous/cockpit,andreasn/cockpit,moraleslazaro/cockpit,mvollmer/cockpit,cockpituous/cockpit,martinpitt/cockpit