Set the github output correctly

Author: Wentao-Kuang

.github/workflows/publish.yml

@@ -18,11 +18,9 @@ jobs:
         id: check_diff
         run: |
           if git diff --name-only origin/master HEAD | grep -F "config/tileset/topographic-v2.json"; then
-            echo "File changed"
-            echo "changed=true" >> $GITHUB_OUTPUT
+            echo "changed=true" >> "$GITHUB_OUTPUT"
           else
-            echo "File Not Change"
-            echo "changed=false" >> $GITHUB_OUTPUT
+            echo "changed=false" >> "$GITHUB_OUTPUT"
           fi
 
   publish-odr:
@@ -52,9 +50,9 @@ jobs:
         id: check_diff
         run: |
           if git diff --name-only HEAD^ HEAD | grep -q "^config/tileset/topographic-v2.json$"; then
-            echo "changed=true" >> $GITHUB_OUTPUT
+            echo "changed=true" >> "$GITHUB_OUTPUT"
           else
-            echo "changed=false" >> $GITHUB_OUTPUT
+            echo "changed=false" >> "$GITHUB_OUTPUT"
           fi
 
       - name: Use Node.js 18.x