docs: avoid using .html extension for blog posts (#17090)

* docs: avoid using `.html` extension for blog posts

* revert `pretty urls` option

scripts/release/tests/publish-to-npm.test.js

@@ -40,7 +40,7 @@ describe("publish-to-npm", () => {
             "[diff](https://github.com/prettier/prettier/compare/2.3.0...2.4.0)",
             `🔗 [Release note](https://prettier.io/blog/${getDateParts().join(
               "/",
-            )}/2.4.0.html)`,
+            )}/2.4.0)`,
           ].join("\n\n"),
         }),
       );
@@ -57,7 +57,7 @@ describe("publish-to-npm", () => {
             "[diff](https://github.com/prettier/prettier/compare/2.2.0...2.3.0)",
             `🔗 [Release note](https://prettier.io/blog/${getDateParts().join(
               "/",
-            )}/2.3.0.html)`,
+            )}/2.3.0)`,
           ].join("\n\n"),
         }),
       );

scripts/release/utils.js

@@ -129,7 +129,7 @@ function getBlogPostInfo(version) {
 
   return {
     file: `website/blog/${year}-${month}-${day}-${version}.md`,
-    path: `blog/${year}/${month}/${day}/${version}.html`,
+    path: `blog/${year}/${month}/${day}/${version}`,
   };
 }