Capitalise first letter of error messages (#2121)

Corona-Warn-App/src/main/java/de/rki/coronawarnapp/exception/CwaSecurityException.kt

@@ -5,7 +5,7 @@ import de.rki.coronawarnapp.exception.reporting.ReportedException
 
 class CwaSecurityException(cause: Throwable) : ReportedException(
     ErrorCodes.CWA_SECURITY_PROBLEM.code,
-    "something went wrong during a critical part of the application ensuring security, please refer" +
+    "Something went wrong during a critical part of the application ensuring security, please refer" +
             " to the details for more information",
     cause
 )

Corona-Warn-App/src/main/java/de/rki/coronawarnapp/exception/CwaWebSecurityException.kt

@@ -5,6 +5,6 @@ import de.rki.coronawarnapp.exception.reporting.ReportedIOException
 
 class CwaWebSecurityException(cause: Throwable) : ReportedIOException(
     ErrorCodes.CWA_WEB_SECURITY_PROBLEM.code,
-    "an error occurred while trying to establish a secure connection to the server",
+    "An error occurred while trying to establish a secure connection to the server",
     cause
 )