Fix JSON-LD schema type and walltime format consistency

- Change @type from SoftwareApplication to SoftwareSourceCode so
  programmingLanguage and codeRepository are conformant properties
- Normalize "30 min" to "30m" to match other gallery entries

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: sbryngelson

docs/index.html

@@ -26,7 +26,7 @@
     <script type="application/ld+json">
     {
       "@context": "https://schema.org",
-      "@type": "SoftwareApplication",
+      "@type": "SoftwareSourceCode",
       "name": "MFC",
       "alternateName": "Multi-Component Flow Code",
       "description": "Open-source exascale multiphase flow solver. 2025 Gordon Bell Prize Finalist. Scales to 200+ trillion grid points on 43,000+ GPUs.",
@@ -61,7 +61,7 @@
             { name: "Shedding water droplet",            image: "res/simulations/a.png", computer: "Summit",   computerUrl: "https://www.olcf.ornl.gov/summit/",                                            accelerators: "960 V100s", walltime: "4h",      source: "https://www.youtube.com/watch?v=Gjj-qZkXcrg" },
             // Biomedical & acoustics
             { name: "Burstwave lithotripsy",             image: "res/simulations/k.png", computer: "Delta",    computerUrl: "https://www.ncsa.illinois.edu/research/project-highlights/delta/",              accelerators: "128 A100s", walltime: "30m",     source: "https://www.youtube.com/watch?v=XWsUTaJXGF8" },
-            { name: "Cavitation fragments kidney stone", image: "res/simulations/d.png", computer: "Summit",   computerUrl: "https://www.olcf.ornl.gov/summit/",                                            accelerators: "576 V100s", walltime: "30 min",  source: "https://doi.org/10.48550/arXiv.2305.09163" },
+            { name: "Cavitation fragments kidney stone", image: "res/simulations/d.png", computer: "Summit",   computerUrl: "https://www.olcf.ornl.gov/summit/",                                            accelerators: "576 V100s", walltime: "30m",  source: "https://doi.org/10.48550/arXiv.2305.09163" },
             { name: "Kidney stone stress waves",         image: "res/simulations/l.png", computer: "Bridges2", computerUrl: "https://www.psc.edu/resources/bridges-2/",                                      accelerators: "8 V100s",   walltime: "20m",     source: "https://www.youtube.com/watch?v=Q2L0J68qnRw" },
             { name: "Whale bubble net feeding",          image: "res/simulations/p.png", computer: "Delta",    computerUrl: "https://www.ncsa.illinois.edu/research/project-highlights/delta/",              accelerators: "128 A100s", walltime: "30m",     source: "https://www.youtube.com/watch?v=6EpP6tdCZSA" },
             { name: "Earplug acoustics (kinetic energy)", image: "res/simulations/q.png", computer: "Delta",    computerUrl: "https://www.ncsa.illinois.edu/research/project-highlights/delta/",              accelerators: "8 A100s",   walltime: "5h",      source: "https://www.youtube.com/watch?v=xSW5wZkdbrc" },