🩹 [Patch]: Pin GitHub-Script action to specific version (#21)

The GitHub-Script action is now pinned to a specific SHA version for
improved security and consistency.

- Fixes #20

## Pin GitHub-Script action

Updated the action reference from version tag to specific SHA:

- `PSModule/GitHub-Script` → `2010983167dc7a41bcd84cb88e698ec18eccb7ca`
(v1.7.8)

This ensures the action version is locked and cannot be changed without
updating the SHA, preventing supply chain attacks.

Author: MariusStorhaug

action.yml

@@ -34,7 +34,7 @@ runs:
   using: composite
   steps:
     - name: Template-Action
-      uses: PSModule/GitHub-Script@8b9d2739d6896975c0e5448d2021ae2b94b6766a # v1.7.6
+      uses: PSModule/GitHub-Script@2010983167dc7a41bcd84cb88e698ec18eccb7ca # v1.7.8
       env:
         PSMOUDLE_TEMPLATE_ACTION_INPUT_Subject: ${{ inputs.Subject }}
       with: