Update map attribution

Author: cbalster

app/src/main/res/values/strings-notranslate.xml

@@ -2,7 +2,7 @@
 <resources>
     <!-- app -->
     <string name="app_name" translatable="false">Critical Maps</string>
-    <string name="osm_credits" translatable="false">\u00a9 <a href="http://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors</string>
+    <string name="osm_credits" translatable="false"><a href="https://maplibre.org">MapLibre</a> | \u00a9 <a href="https://www.openstreetmap.org/copyright">OpenStreetMap</a> contributors</string>
     <string name="about_text_map_url" translatable="false">criticalmaps.net</string>
     <string name="about_text_contributors" translatable="false">Gitti la Mar (Old Logo) \nJan Rabe (Code) \nChristian Balster (Code) \nLigi (Code) \nCaner Başaran (Translations) \nTobias Preuss (Code) \nLuca Gemini (Translations) \nLena Osswald (Translations) \nRodrigo Aguilera (Translations) \nHelen Sawyer (Translations)\nPeter Amende (Logo \u0026 Design)\nAaron Lau (Translations)\ntherasius (Translations)\nAlban Sagouis (Translations)\nAskar Syzdykov (Translations \u0026 Code)\nAlexander Mai (Translations)\nAndrei Guliaikin (Translations)\nIgor (Translations)\nStefan Kinzel (Code)\nwatchingJu (Translations)\ntrendspotter (Translations)\nHeimen Stoffels (Translations)</string>
     <string name="contact_email" translatable="false">stephanlindauer@posteo.de</string>