refactor: update steamuser and steampass insertion in LGSM configuration

The code changes refactor the way steamuser and steampass are inserted into the LGSM configuration file. Instead of hardcoding the values, they are now dynamically inserted using environment variables. This improves flexibility and security when setting up the server.

.github/workflows/update-check.yml

@@ -33,11 +33,11 @@ jobs:
 
       - name: Insert steamuser
         if: matrix.shortname == 'jk2'
-        run: sed -i 's/steamuser=""/steamuser="${STEAMCMD_USER}"/g' lgsm/config-lgsm/jk2server/common.cfg
+        run: sed -i 's/steamuser=""/steamuser="${STEAMCMD_USER}"/g' lgsm/config-lgsm/${{ matrix.shortname }}server/common.cfg
 
       - name: Insert steampass
         if: matrix.shortname == 'jk2'
-        run: sed -i 's/steampass=""/steampass='${STEAMCMD_PASS}' lgsm/config-lgsm/jk2server/common.cfg
+        run: sed -i 's/steampass=""/steampass='${STEAMCMD_PASS}'/g' lgsm/config-lgsm/${{ matrix.shortname }}server/common.cfg
 
       - name: Install server
         run: LGSM_GITHUBBRANCH="${GITHUB_REF#refs/heads/}" ./${{ matrix.shortname }}server auto-install