Update dependency ethers to v6.15.0 (#283)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

yarn.lock

@@ -1437,9 +1437,9 @@ ethereum-cryptography@^2.2.0, ethereum-cryptography@^2.2.1:
     "@scure/bip39" "1.3.0"
 
 ethers@^6.0.0:
-  version "6.14.4"
-  resolved "https://registry.yarnpkg.com/ethers/-/ethers-6.14.4.tgz#0f6fbc562a8425c7c888da307fa71ef796be0c04"
-  integrity sha512-Jm/dzRs2Z9iBrT6e9TvGxyb5YVKAPLlpna7hjxH7KH/++DSh2T/JVmQUv7iHI5E55hDbp/gEVvstWYXVxXFzsA==
+  version "6.15.0"
+  resolved "https://registry.yarnpkg.com/ethers/-/ethers-6.15.0.tgz#2980f2a3baf0509749b7e21f8692fa8a8349c0e3"
+  integrity sha512-Kf/3ZW54L4UT0pZtsY/rf+EkBU7Qi5nnhonjUb8yTXcxH3cdcWrV2cRyk0Xk/4jK6OoHhxxZHriyhje20If2hQ==
   dependencies:
     "@adraffy/ens-normalize" "1.10.1"
     "@noble/curves" "1.2.0"