Add handling for ' characters in non-html text so they don't get sani…

…tized into html code values

packages/mermaid/src/rendering-util/handle-markdown-text.ts

@@ -39,6 +39,7 @@ export function markdownToLines(markdown: string, config: MermaidConfig = {}): M
           lines.push([]);
         }
         textLine.split(' ').forEach((word) => {
+          word = word.replace(/'/g, `'`);
           if (word) {
             lines[currentLine].push({ content: word, type: parentType });
           }