fix(v2): hash-link should not be cut-off in doc container (#1942)

* fix(v2): hash-link should not be cut-off in doc container

* nits

CHANGELOG-2.x.md

@@ -6,6 +6,7 @@
 - Add feed for blog posts.
 - **HOTFIX for 2.0.0-alpha.32** - Fix build compilation if exists only one code tab.
 - Add table of contents highlighting on scroll.
+- Add minor padding to docs container so that hash-link won't be cut off.
 - **BREAKING** `prismTheme` is renamed to `theme` as part new `prism` object in `themeConfig` field in your `docusaurus.config.js`. Eg: 
   ```diff
    themeConfig: {

packages/docusaurus-theme-classic/src/theme/DocItem/styles.module.css

@@ -19,6 +19,7 @@
 
 .docItemContainer {
   margin: 0 auto;
+  padding: 0 0.5rem;
   max-width: 45em;
 }
 
@@ -34,4 +35,8 @@
   .tableOfContents {
     display: none;
   }
+
+  .docItemContainer {
+    padding: 0 0.3rem;
+  }
 }