ci: Generate checksum before trying to copy it

.github/workflows/devbuild.yml

@@ -41,6 +41,12 @@ jobs:
           ./gradlew build --info --full-stacktrace
           ./gradlew media --info --full-stacktrace
 
+      - name: Generate checksum
+        uses: jmgilman/actions-generate-checksum@v1
+        with:
+          patterns: |
+            continuous/*
+
       - name: Collect files
         run: |
           mkdir continuous
@@ -52,12 +58,6 @@ jobs:
           cp media/*.exe continuous/
           cp checksum.txt continuous/
 
-      - name: Generate checksum
-        uses: jmgilman/actions-generate-checksum@v1
-        with:
-          patterns: |
-            continuous/*
-
       - name: Upload to GitHub Releases
         uses: "marvinpinto/action-automatic-releases@latest"
         with: