chore: Update libxrpl to 2.6.1-rc2 (#2652)

We'll still need to update to `xrpl/2.6.1` when it is out, but let's
first update it to merge the other PR that depends on xrpl changes

conan.lock

@@ -3,7 +3,7 @@
     "requires": [
         "zlib/1.3.1#b8bc2603263cf7eccbd6e17e66b0ed76%1756234269.497",
         "xxhash/0.8.3#681d36a0a6111fc56e5e45ea182c19cc%1756234289.683",
-        "xrpl/2.6.0#57b93b5a6c99dc8511fccb3bb5390352%1756820296.642",
+        "xrpl/2.6.1-rc2#c14c6a4092fb2b97d3a93906dcee87b7%1759161400.392",
         "sqlite3/3.49.1#8631739a4c9b93bd3d6b753bac548a63%1756234266.869",
         "spdlog/1.15.3#3ca0e9e6b83af4d0151e26541d140c86%1754401846.61",
         "soci/4.0.3#a9f8d773cd33e356b5879a4b0564f287%1756234262.318",
@@ -41,15 +41,12 @@
     "overrides": {
         "boost/1.83.0": [
             null,
-            "boost/1.83.0"
+            "boost/1.83.0#5d975011d65b51abb2d2f6eb8386b368"
         ],
         "protobuf/3.21.12": [
             null,
             "protobuf/3.21.12"
         ],
-        "boost/1.86.0": [
-            "boost/1.83.0#5d975011d65b51abb2d2f6eb8386b368"
-        ],
         "lz4/1.9.4": [
             "lz4/1.10.0"
         ],

conanfile.py

@@ -18,7 +18,7 @@ class ClioConan(ConanFile):
         'protobuf/3.21.12',
         'grpc/1.50.1',
         'openssl/1.1.1w',
-        'xrpl/2.6.0',
+        'xrpl/2.6.1-rc2',
         'zlib/1.3.1',
         'libbacktrace/cci.20210118',
         'spdlog/1.15.3',