Release process: split one-liner

wiki/src/contribute/release_process.mdwn

@@ -436,8 +436,10 @@ pages that were added or changed accordingly to changes coming with
 the new release. This e.g. ensures that the RC call for translation
 points translators to up-to-date PO files:
 
-	./build-website && git add wiki/src && git commit -m 'Update website PO files.'
-	git push origin "${RELEASE_BRANCH:?}:${RELEASE_BRANCH:?}"
+    ./build-website && \
+    git add wiki/src && \
+    git commit -m 'Update website PO files.'
+    git push origin "${RELEASE_BRANCH:?}:${RELEASE_BRANCH:?}"
 
 Call for translation
 ====================