Allow linking to additional features headings

This is possible on the previous release pages, but for some reason wasn't implemented for PHP 8.5.

Author: theodorejb

releases/8.5/release.inc

@@ -686,7 +686,7 @@ PHP
         <div class="release-notes-grid-container">
             <div class="release-notes-grid">
                 <div>
-                    <h2><?= message('new_classes_title', $lang) ?></h2>
+                    <h2 id="additional-improvements"><?= message('new_classes_title', $lang) ?></h2>
                     <ul class="new">
                         <li><?= message('fatal_error_backtrace', $lang) ?></li>
                         <li><?= message('const_attribute_target', $lang) ?></li>
@@ -712,7 +712,7 @@ PHP
                     </ul>
                 </div>
                 <div>
-                    <h2><?= message('bc_title', $lang) ?></h2>
+                    <h2 id="deprecations-and-bc-breaks"><?= message('bc_title', $lang) ?></h2>
                     <ul class="old">
                         <li><?= message('bc_backtick_operator', $lang, [
                                 '<a href="/manual/' . $documentation . '/function.shell-exec.php"><code>shell_exec()</code></a>'

styles/php85.css

@@ -75,13 +75,15 @@ code[class*=language-], pre[class*=language-] {
 }
 
 .features-title h2,
+.release-notes h2,
 .before-and-after-title-and-description h2 {
     position: relative;
     overflow: visible;
     display: inline-block;
 }
 
 .features-title h2 .genanchor,
+.release-notes h2 .genanchor,
 .before-and-after-title-and-description h2 .genanchor {
     position: absolute;
     top: 4px;
@@ -97,11 +99,13 @@ code[class*=language-], pre[class*=language-] {
 }
 
 .dark .features-title h2 .genanchor,
+.dark .release-notes h2 .genanchor,
 .dark .before-and-after-title-and-description h2 .genanchor {
     background: url("/images/php8/anchor-white.svg") scroll no-repeat left center / 21px 16px transparent;
 }
 
 .features-title h2:hover .genanchor,
+.release-notes h2:hover .genanchor,
 .before-and-after-title-and-description h2:hover .genanchor {
     display: block;
 }
@@ -2170,7 +2174,6 @@ header nav {
 }
 
 .release-notes ul {
-    margin-top: calc(var(--spacing) * 6);
     margin-left: calc(var(--spacing) * 4);
     list-style-type: disc
 }