Add default to workflow.yml ImportantFilePatterns and update README disable behavior

Agent-Logs-Url: https://github.com/PSModule/Process-PSModule/sessions/088ca732-ee58-4c14-988d-37dedbcef078

Co-authored-by: MariusStorhaug <17722253+MariusStorhaug@users.noreply.github.com>

Author: Copilot

.github/workflows/workflow.yml

@@ -65,6 +65,9 @@ on:
           Changes matching these patterns trigger build, test, and publish stages.
           When set, fully replaces the defaults (^src/ and ^README\.md$).
         required: false
+        default: |
+          ^src/
+          ^README\.md$
 
 permissions:
   contents: write      # to checkout the repo and create releases on the repo

README.md

@@ -500,8 +500,10 @@ jobs:
         ^examples/
 ```
 
-To disable triggering via workflow input, pass an empty string or omit the `with:` block entirely and rely on the
-settings file instead.
+To disable triggering via workflow input, pass an explicit empty string. Note that omitting the input entirely causes
+the workflow's default patterns (`^src/` and `^README\.md$`) to be used — the settings file takes priority over the
+workflow input, so set `ImportantFilePatterns: []` in `.github/PSModule.yml` to disable triggering regardless of the
+workflow input.
 
 Resolution order: settings file → workflow input → hardcoded defaults.