remove tab

Author: Vladimir Kotal

.github/workflows/javadoc.yml

@@ -31,5 +31,5 @@ jobs:
         OPENGROK_REPO_SLUG: ${{ github.repository }}
         OPENGROK_PULL_REQUEST: ${{ github.head_ref }}
         OPENGROK_REF: ${{ github.ref }}
-	OPENGROK_BUILD_DIR: ${{ github.workspace }}
+        OPENGROK_BUILD_DIR: ${{ github.workspace }}
       run: ./dev/javadoc.sh