Update pnpm version to 10.28.1 in all remaining workflow files

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

.github/workflows/lint.yml

@@ -27,7 +27,7 @@ jobs:
       - name: Install pnpm
         uses: pnpm/action-setup@v4
         with:
-          version: 10.28.0
+          version: 10.28.1
 
       - name: Get pnpm store directory
         shell: bash

.github/workflows/pr-automation.yml

@@ -68,7 +68,7 @@ jobs:
       - name: Install pnpm
         uses: pnpm/action-setup@v4
         with:
-          version: 10.28.0
+          version: 10.28.1
 
       - name: Install dependencies
         run: pnpm install --frozen-lockfile

.github/workflows/validate-deps.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Install pnpm
         uses: pnpm/action-setup@v4
         with:
-          version: 10.28.0
+          version: 10.28.1
 
       - name: Get pnpm store directory
         shell: bash