fix: slugify tag on page before adding (closes #411)

quartz/plugins/transformers/ofm.ts

@@ -383,13 +383,14 @@ export const ObsidianFlavoredMarkdown: QuartzTransformerPlugin<Partial<Options>
           return (tree: Root, file) => {
             const base = pathToRoot(file.data.slug!)
             findAndReplace(tree, tagRegex, (_value: string, tag: string) => {
+              tag = slugTag(tag)
               if (file.data.frontmatter && !file.data.frontmatter.tags.includes(tag)) {
                 file.data.frontmatter.tags.push(tag)
               }
 
               return {
                 type: "link",
-                url: base + `/tags/${slugTag(tag)}`,
+                url: base + `/tags/${tag}`,
                 data: {
                   hProperties: {
                     className: ["tag-link"],