set concurrency identifiers for steam access

Author: myk002

.github/workflows/steam-deploy.yml

@@ -62,7 +62,7 @@ jobs:
     - depot-win64
     - depot-linux64
     runs-on: ubuntu-latest
-    concurrency: steam
+    concurrency: steamdeploy
     steps:
     - name: Download depot files
       uses: actions/download-artifact@v4

.github/workflows/watch-df-steam.yml

@@ -10,6 +10,7 @@ jobs:
     if: github.repository == 'DFHack/dfhack'
     name: Check DF ${{ matrix.df_steam_branch }} branch
     runs-on: ubuntu-latest
+    concurrency: steampoll
     strategy:
       fail-fast: false
       matrix: