refactor(workflow): reorder Setup SSH key step

- Moved the `Setup SSH key` step after the `Check known hosts file` step for better logical sequence in the workflow.
- Ensures `known_hosts` is checked before setting up the SSH key.

Author: warnyul

.github/workflows/pull_request.yml

@@ -14,12 +14,6 @@ jobs:
     runs-on: ${{ matrix.os }}      
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
-      - name: Setup SSH key
-        uses: ./
-        with:
-          ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}
-          ssh-known-hosts: ${{ secrets.SSH_KNOWN_HOSTS }}
-          log-public-key: false
       - name: Check known hosts file
         uses: pyTooling/Actions/with-post-step@9ceefdbf5dceae8c441fc393ed82344c7ca8bbdb # v3.1.1
         env:
@@ -29,6 +23,12 @@ jobs:
             sh check.sh
           post: |
             sh post_check.sh
+      - name: Setup SSH key
+        uses: ./
+        with:
+          ssh-private-key: ${{ secrets.SSH_PRIVATE_KEY }}
+          ssh-known-hosts: ${{ secrets.SSH_KNOWN_HOSTS }}
+          log-public-key: false
       - name: Install docker (Missing on MacOS)
         if: runner.os == 'macos'
         shell: bash