LibCrypto: Make a VERIFY a static_assert since it only uses constants

Author: https://github.com/davidot
Commit: 2290fbc2a0
Pull-request: https://github.com/SerenityOS/serenity/pull/14929
Reviewed-by: https://github.com/alimpfard ✅
Reviewed-by: https://github.com/linusg

Userland/Libraries/LibCrypto/BigInt/UnsignedBigInteger.cpp

@@ -104,7 +104,7 @@ String UnsignedBigInteger::to_base(u16 N) const
 
 u64 UnsignedBigInteger::to_u64() const
 {
-    VERIFY(sizeof(Word) == 4);
+    static_assert(sizeof(Word) == 4);
     if (!length())
         return 0;
     u64 value = m_words[0];