[DOCS] Fix typo in package URL (#77091)

Author: lcawl

docs/developer/getting-started/index.asciidoc

@@ -49,7 +49,7 @@ ____
 
 (You can also run `yarn kbn` to see the other available commands. For
 more info about this tool, see
-{kib-repo}tree/{branch}/packages/kbn-pm[{kib-repo}tree/{branch}packages/kbn-pm].)
+{kib-repo}tree/{branch}/packages/kbn-pm[{kib-repo}tree/{branch}/packages/kbn-pm].)
 
 When switching branches which use different versions of npm packages you
 may need to run:
@@ -137,4 +137,4 @@ include::debugging.asciidoc[leveloffset=+1]
 
 include::building-kibana.asciidoc[leveloffset=+1]
 
-include::development-plugin-resources.asciidoc[leveloffset=+1]
+include::development-plugin-resources.asciidoc[leveloffset=+1]