Loosen lower-level nornir package versions

Updating the top-level nornir package version is difficult to do by hand
or via dependabot with its child packages locked.

This allows nornir to update and pull in newer child packages as needed.

pyproject.toml

@@ -58,9 +58,9 @@ dependencies = [
     'netaddr==1.3.0',
     'netmiko==4.4.0',
     'netutils==1.10.0',
-    'nornir-netmiko==1.0.1',
-    'nornir-salt==0.19.2',
-    'nornir-scrapli==2023.1.30.post1',
+    'nornir-netmiko>=1.0.1',
+    'nornir-salt>=0.19.2',
+    'nornir-scrapli>=2023.1.30.post1',
     'nornir==3.4.1',
     'openpyxl==3.1.5',
     'pyyaml==6.0.2',