⚙️ [Maintenance]: Release automation now tracks important module changes (#63)

Release automation now updates only when meaningful module files change,
and the shared Process-PSModule workflow is pinned to a newer framework
release. This keeps maintenance runs aligned with source-impacting edits
while reducing noise from unrelated repository changes.

## Changed: Important file detection for processing runs

The repository configuration now defines important file patterns so
processing logic treats source, documentation entrypoint, and module
project files as the meaningful change surface.

```yaml
ImportantFilePatterns:
  - '^src/'
  - '^README\.md$'
  - '^PSModule/'
```

## Changed: Workflow framework version

The Process-PSModule reusable workflow reference is updated from
`v5.4.6` to `v5.5.2`, enabling workflow behavior that supports the
configured important file patterns and current maintenance pipeline
expectations.

## Technical Details

- Updated `.github/PSModule.yml` to add `ImportantFilePatterns` for
`src/`, `README.md`, and `PSModule/`.
- Updated `.github/workflows/Process-PSModule.yml` to pin
`PSModule/Process-PSModule` workflow to
`e8f5b22925c5a4dcf462d8b212570b66ce6a8df4` (`v5.5.2`).

Author: MariusStorhaug

.github/PSModule.yml

@@ -2,6 +2,11 @@
 # Reference:
 # - https://github.com/PSModule/Process-PSModule?tab=readme-ov-file#configuration
 
+ImportantFilePatterns:
+  - '^src/'
+  - '^README\.md$'
+  - '^PSModule/'
+
 Test:
   CodeCoverage:
     PercentTarget: 80

.github/workflows/Process-PSModule.yml

@@ -27,5 +27,5 @@ permissions:
 
 jobs:
   Process-PSModule:
-    uses: PSModule/Process-PSModule/.github/workflows/workflow.yml@205d193f34cbbaf9992955c21d842bcf98a1859f # v5.4.6
+    uses: PSModule/Process-PSModule/.github/workflows/workflow.yml@e8f5b22925c5a4dcf462d8b212570b66ce6a8df4 # v5.5.2
     secrets: inherit