Fix potential UnboundLocalError on docs (#513)

* Fix potential NameError on docs

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

changelogs/fragments/ule-docs.yaml

@@ -0,0 +1,4 @@
+---
+bugfixes:
+  - network_resource - fix a potential UnboundLocalError if the module fails to import a
+    Resource Module. (https://github.com/ansible-collections/ansible.netcommon/pull/513)

galaxy.yml

@@ -13,4 +13,4 @@ readme: README.md
 repository: https://github.com/ansible-collections/ansible.netcommon
 issues: https://github.com/ansible-collections/ansible.netcommon/issues
 tags: [networking, security, cloud, network_cli, netconf, httpapi, grpc]
-version: 5.0.0
+version: 5.0.1-dev

plugins/action/network_resource.py

@@ -238,6 +238,7 @@ def _list_resource_modules(self):
 
             for module_path in module_paths:
                 module_name = os.path.basename(module_path).split(".")[0]
+                docs = None
                 try:
                     display.vvvv(
                         "reading 'DOCUMENTATION' from path %s" % (module_path)