Update copy year to 2024

index.html

@@ -55,8 +55,8 @@ <h2>Sign up for OSDM Sandbox</h2>
         <p>The <a href="assets/Bileto%20OSDM%20Sandbox.postman_collection.json" download>Postman Collection</a> with example requests is available for download. The credentials will be provided upon signup with form above.</p>
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-        <p>Web osdm.cz &copy; 2023 BTO software technologies s.r.o. (<a href="https://bileto.com">Bileto</a>)</p>
-        <p>Specification <abbr title="Open Sales and Distribution Model" lang="en">OSDM</abbr> &copy 2020 &ndash; 2023 <a href="https://uic.org" title="Union Internationale des Chemins de fer" lang="fr">UIC</a> under <a href="https://www.apache.org/licenses/LICENSE-2.0">Apache License 2.0</a></p>
+        <p>Web osdm.cz &copy; 2024 BTO software technologies s.r.o. (<a href="https://bileto.com">Bileto</a>)</p>
+        <p>Specification <abbr title="Open Sales and Distribution Model" lang="en">OSDM</abbr> &copy 2020 &ndash; 2024 <a href="https://uic.org" title="Union Internationale des Chemins de fer" lang="fr">UIC</a> under <a href="https://www.apache.org/licenses/LICENSE-2.0">Apache License 2.0</a></p>
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