feat: make "th" in "Nth" superscript in hero title

Targets the 2nd and 3rd lava-letter in the first lava-text span
with font-size: 0.55em and vertical-align: super.

Generated with [Claude Code](https://claude.ai/code)
via [Happy](https://happy.engineering)

Co-Authored-By: Claude <noreply@anthropic.com>
Co-Authored-By: Happy <yesreply@happy.engineering>

Author: 3 people

docs/projects/nthpartyfinder/index.html

@@ -305,6 +305,11 @@
   z-index: 1;
   filter: drop-shadow(1px 1px 0px #000);
 }
+.hero-title > .lava-text:first-child > .lava-letter:nth-child(2),
+.hero-title > .lava-text:first-child > .lava-letter:nth-child(3) {
+  font-size: 0.55em;
+  vertical-align: super;
+}
 @keyframes lava-flow {
   0%   { background-position: 0% 50%; }
   50%  { background-position: 100% 50%; }