add more header ids for usage in links

static/index.html

@@ -33,7 +33,7 @@
             </ul>
         </nav>
         <div id="content">
-            <h1>GrapheneOS</h1>
+            <h1 id="grapheneos">GrapheneOS</h1>
             <p>GrapheneOS is an open source privacy and security focused mobile OS with Android
             app compatibility.</p>
             <p>Official Releases are available on the <a href="/releases">releases page</a> and
@@ -51,7 +51,7 @@
             support for your own builds.</p>
             <p>The sources are available via the
             <a href="https://github.com/GrapheneOS/platform_manifest">manifest on GitHub</a>.</p>
-            <h2>Early stage of development</h2>
+            <h2 id="early-stage-of-development">Early stage of development</h2>
             <p>GrapheneOS is a privacy / security research and engineering project that has been
             under way for over 5 years. It recently became rebranded as GrapheneOS and is taking a
             different direction based on obtaining funding for the research and development work
@@ -67,7 +67,7 @@
             applications. It will take more time to organize and deploy these resources in order
             for the project to have a strong development team with proper infrastructure behind
             it.</p>
-            <h2>Roadmap</h2>
+            <h2 id="roadmap">Roadmap</h2>
             <p>Details on the roadmap of the project will be posted on the site in the near
             future. In the long term, it aims to move beyond a hardened fork of the Android Open
             Source Project. Achieving the goals requires moving away from relying the Linux kernel