fix: correct syntax for runs-on in docs deployment workflow

Author: pascalinthecloud

.github/workflows/docs_astro_deploy.yaml

@@ -32,7 +32,7 @@ env:
 jobs:
   build:
     name: Build
-    runs-on: ubuntu-latest´
+    runs-on: ubuntu-latest
     defaults:
       run:
         working-directory: docs