chore: fix tools/update-docs (#594)

* chore: fix tools/update-docs

* fix

Author: ota-meshi

docs/rules/no-useless-non-capturing-group.md

@@ -13,7 +13,7 @@ since: "v0.4.0"
 
 <!-- end auto-generated rule header -->
 
-> disallow unnecessary Non-capturing group
+> disallow unnecessary non-capturing group
 
 ## :book: Rule Details
 

docs/rules/no-useless-range.md

@@ -13,7 +13,7 @@ since: "v0.3.0"
 
 <!-- end auto-generated rule header -->
 
-> disallow unnecessary range of characters by using a hyphen
+> disallow unnecessary character ranges
 
 ## :book: Rule Details
 

tools/update-docs.ts

@@ -150,6 +150,22 @@ ${
         return this
     }
 
+    public updateHeaderDescription() {
+        const { description } = this.rule.meta.docs
+
+        this.content = this.content.replace(
+            // eslint-disable-next-line regexp/no-super-linear-move -- ignore
+            /\n+> [^\n]*\n+##\s[^\n]*Rule Details/u,
+            `
+
+> ${description.replace(/\$/gu, "$$$$")}
+
+## :book: Rule Details`,
+        )
+
+        return this
+    }
+
     public write() {
         this.content = this.content.replace(/\r?\n/gu, "\n")
 
@@ -166,6 +182,7 @@ async function main() {
         await doc.updateFooter()
         doc.updateCodeBlocks()
         await doc.updateFileIntro()
+        doc.updateHeaderDescription()
         doc.adjustCodeBlocks()
         doc.write()
     }