Core/Analytics: Turn analytics URL into a C-string

Less reading and also doesn't store an unnecessary pointer value in the
executable, making it smaller by 8 bytes.

Source/Core/Core/Analytics.cpp

@@ -36,7 +36,7 @@
 
 namespace
 {
-constexpr const char* ANALYTICS_ENDPOINT = "https://analytics.dolphin-emu.org/report";
+constexpr char ANALYTICS_ENDPOINT[] = "https://analytics.dolphin-emu.org/report";
 }  // namespace
 
 #if defined(ANDROID)