Simplify regex for GitHub Action references

.github/actions/set-gha-refs/Set-Called-GHA-Refs.ps1

@@ -12,7 +12,7 @@ if ($CalledRepoBaseIncludeList.Count -eq 0)
 }
 else
 {
-    $CalledRepoBaseIncludeList = $CalledRepoBaseIncludeList.ForEach({ 'uses:\s*' + $PSItem + '.*@(?<ref>[aA-zZ,0-9,-,\.,/,_]*)' })
+    $CalledRepoBaseIncludeList = $CalledRepoBaseIncludeList.ForEach({ 'uses:\s*' + $PSItem + '.*@(?<ref>[\w\./-]*)' })
 
     $matchedRefs = Get-ChildItem -Path $PathIncludeList -Include $FileIncludeList -Force -Recurse |
         Select-String -Pattern $CalledRepoBaseIncludeList

.github/actions/set-gha-refs/action.yml

@@ -27,8 +27,8 @@ inputs:
     default: '@()'
     description: >
       PowerShell string array of additional RegEx patterns to include when searching for branch references that need to
-      be updated, e.g. 'https://raw.githubusercontent.com/Lombiq/GitHub-Actions/(?<ref>[aA-zZ,0-9,-,\.,/,_]*)/.github/'.
-      The pattern MUST include a regex named capture group (?<ref>[aA-zZ,0-9,-,\.,/,_]*) so the captured ref can be
+      be updated, e.g. 'https://raw.githubusercontent.com/Lombiq/GitHub-Actions/(?<ref>[\w\./-]*)/.github/'.
+      The pattern MUST include a regex named capture group (?<ref>[\w\./-]*) so the captured ref can be
       updated correctly. The parameter must be a PowerShell string array.
   expected-ref:
     required: true

.github/workflows/tag-version-this-repo.yml

@@ -11,6 +11,6 @@ jobs:
     if: github.event.pusher.name != 'LombiqBot'
     uses: Lombiq/GitHub-Actions/.github/workflows/tag-version.yml@issue/OSOE-735
     with:
-      additional-pattern-include-list: '@("https://raw.githubusercontent.com/Lombiq/GitHub-Actions/(?<ref>[aA-zZ,0-9,-,\.,/,_]*)/.github")'
+      additional-pattern-include-list: '@("https://raw.githubusercontent.com/Lombiq/GitHub-Actions/(?<ref>[\w\./-]*)/.github")'
     secrets:
       TAG_VERSION_TOKEN: ${{ secrets.LOMBIQBOT_GITHUB_PERSONAL_ACCESS_TOKEN }}

.github/workflows/tag-version.yml

@@ -47,8 +47,8 @@ on:
         description: >
           PowerShell string array of additional RegEx patterns to include when searching for branch references that need
           to be updated, e.g.
-          'https://raw.githubusercontent.com/Lombiq/GitHub-Actions/(?<ref>[aA-zZ,0-9,-,\.,/,_]*)/.github/'. The pattern
-          MUST include a regex named capture group (?<ref>[aA-zZ,0-9,-,\.,/,_]*) so the captured ref can be updated
+          'https://raw.githubusercontent.com/Lombiq/GitHub-Actions/(?<ref>[\w\./-]*)/.github/'. The pattern
+          MUST include a regex named capture group (?<ref>[\w\./-]*) so the captured ref can be updated
           correctly. The parameter must be a PowerShell string array.
         type: string
       expected-ref: