Fix code action title by adding closing quotation mark

Signed-off-by: Jessica He <jhe@redhat.com>

org.eclipse.lemminx/src/main/java/org/eclipse/lemminx/extensions/contentmodel/participants/codeactions/cvc_elt_1_aCodeAction.java

@@ -91,7 +91,7 @@ public void doCodeAction(ICodeActionRequest request, List<CodeAction> codeAction
 
 			for (String expectedElementText : expectedElements) {
 				CodeAction addReplaceRootElement = CodeActionFactory.replaceAt(
-						"Replace '" + unexpectedElementText + "' with '" + expectedElementText, expectedElementText,
+						"Replace '" + unexpectedElementText + "' with '" + expectedElementText + "'", expectedElementText,
 						document.getTextDocument(), diagnostic, ranges);
 
 				codeActions.add(addReplaceRootElement);