fix(workflows): run update-check on PRs and normalize ref resolution

Apply the same PR-safe workflow behavior used in details-check:
- Trigger update-check on pull_request to develop
- Resolve LGSM_REF to PR head SHA or branch ref name
- Use LGSM_REF for linuxgsm.sh download and LGSM_GITHUBBRANCH calls

This ensures update-check validates PR changes instead of only running on
develop pushes.

.github/workflows/update-check.yml

@@ -5,6 +5,9 @@ on:
   push:
     branches:
       - develop
+  pull_request:
+    branches:
+      - develop
 
 permissions: {}
 
@@ -16,6 +19,8 @@ jobs:
   update-check:
     if: github.repository_owner == 'GameServerManagers'
     runs-on: ubuntu-latest
+    env:
+      LGSM_REF: ${{ github.event.pull_request.head.sha || github.ref_name }}
 
     strategy:
       fail-fast: false
@@ -24,30 +29,30 @@ jobs:
 
     steps:
       - name: Download linuxgsm.sh
-        run: wget "https://raw.githubusercontent.com/GameServerManagers/LinuxGSM/${GITHUB_REF#refs/heads/}/linuxgsm.sh"; chmod +x linuxgsm.sh
+        run: wget "https://raw.githubusercontent.com/GameServerManagers/LinuxGSM/${LGSM_REF}/linuxgsm.sh"; chmod +x linuxgsm.sh
 
       - name: Install dependencies
         run: sudo dpkg --add-architecture i386; sudo apt-get update;
 
       - name: Grab server
-        run: LGSM_GITHUBBRANCH="${GITHUB_REF#refs/heads/}" ./linuxgsm.sh ${{ matrix.shortname }}server
+        run: LGSM_GITHUBBRANCH="${LGSM_REF}" ./linuxgsm.sh ${{ matrix.shortname }}server
 
       - name: Enable developer mode
-        run: LGSM_GITHUBBRANCH="${GITHUB_REF#refs/heads/}" ./${{ matrix.shortname }}server developer
+        run: LGSM_GITHUBBRANCH="${LGSM_REF}" ./${{ matrix.shortname }}server developer
 
       - name: Insert steamuser
         if: matrix.shortname == 'jk2'
         run: echo -e "steamuser=\"${{ secrets.STEAMCMD_USER }}\"\nsteampass='${{ secrets.STEAMCMD_PASS }}'" > lgsm/config-lgsm/${{ matrix.shortname }}server/common.cfg
 
       - name: Install server
-        run: LGSM_GITHUBBRANCH="${GITHUB_REF#refs/heads/}" ./${{ matrix.shortname }}server auto-install
+        run: LGSM_GITHUBBRANCH="${LGSM_REF}" ./${{ matrix.shortname }}server auto-install
 
       - name: Check Update server
-        run: LGSM_GITHUBBRANCH="${GITHUB_REF#refs/heads/}" ./${{ matrix.shortname }}server check-update
+        run: LGSM_GITHUBBRANCH="${LGSM_REF}" ./${{ matrix.shortname }}server check-update
 
       - name: Update server
-        run: LGSM_GITHUBBRANCH="${GITHUB_REF#refs/heads/}" ./${{ matrix.shortname }}server update
+        run: LGSM_GITHUBBRANCH="${LGSM_REF}" ./${{ matrix.shortname }}server update
 
       - name: Force Update server
         if: matrix.shortname == 'css'
-        run: LGSM_GITHUBBRANCH="${GITHUB_REF#refs/heads/}" ./${{ matrix.shortname }}server force-update
+        run: LGSM_GITHUBBRANCH="${LGSM_REF}" ./${{ matrix.shortname }}server force-update