Update blog post headers

Author: slowcheetah

docs/2019-03-19-core-js-3-babel-and-a-look-into-the-future.md

@@ -1,9 +1,9 @@
-# core-js@3, babel and a look into the future
-
 After more than 1.5 years of development, dozens of pre-releases, many sleepless nights, **[`core-js@3`](https://github.com/zloirock/core-js)** is finally released. It's the largest set of changes in `core-js` and polyfilling-related **[`babel`](https://babeljs.io)** features of all time.
 
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+# core-js@3, babel and a look into the future
+
 What is `core-js`?
 - It is a polyfill of the JavaScript standard library, which supports:
   - The latest ECMAScript standard.

docs/2023-02-14-so-whats-next.md

@@ -1,11 +1,11 @@
-# So, what's next?
-
 <p align="center"><img alt="core-js" src="https://user-images.githubusercontent.com/2213682/146607186-8e13ddef-26a4-4ebf-befd-5aac9d77c090.png" /></p>
 
 Hi. I am (**[@zloirock](https://github.com/zloirock)**), a full-time open-source developer. I don't like to write long posts, but it seems it is high time to do it. Initially, this post was supposed to be a post about the start of active development of the new major version of `core-js` and the roadmap (it was moved to [the second half](#roadmap)), however, due to recent events, it became a really long post about many different things... I'm fucking tired. Free open-source software is fundamentally broken. I could stop working on this silently, but I want to give open-source one last chance.
 
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+# So, what's next?
+
 <details>
 <summary><b>🔻 Click to see how you can help 🔻</b></summary>