fix(anchors): rename #projects → #portfolio and #mini-projects → #activity (links + targets + css)

src/partials/mini-projects-section.html

@@ -1,4 +1,4 @@
-      <section id="mini-projects" class="section section--surface" aria-labelledby="mini-projects-title" data-reveal>
+      <section id="activity" class="section section--surface" aria-labelledby="mini-projects-title" data-reveal>
         <div class="section__inner">
           <h2 id="mini-projects-title" class="section__title">Активность</h2>
           <div