Fix build error due to missing include

Error was:

| literals.cpp: In function 'libp2p::common::Hash256 libp2p::common::operator""_hash256(const char*, size_t)':
| literals.cpp:17:36: error: no matching function for call to 'min(size_t&, long unsigned int)'
|    17 |     std::copy_n(c, std::min(s, 32ul), hash.rbegin());
|       |                                    ^

Author: eigendude

src/common/literals.cpp

@@ -11,6 +11,8 @@
 #include <libp2p/multi/multihash.hpp>
 #include <libp2p/peer/peer_id.hpp>
 
+#include <algorithm>
+
 namespace libp2p::common {
   libp2p::common::Hash256 operator""_hash256(const char *c, size_t s) {
     libp2p::common::Hash256 hash{};