build(deps): Bump github.com/attestantio/go-eth2-client from 0.21.5 t…

…o 0.21.6 (#3137)

Bumps [github.com/attestantio/go-eth2-client](https://github.com/attestantio/go-eth2-client) from 0.21.5 to 0.21.6.
<details>
<summary>Commits</summary>
<ul>
<li><a href="https://github.com/attestantio/go-eth2-client/commit/da19cf12ec676e49332caf9f8b08ad28f0e47e8c"><code>da19cf1</code></a> Bump release.</li>
<li><a href="https://github.com/attestantio/go-eth2-client/commit/ec55dc81b6cd32b6243ad1d0b5987f8c36cc4656"><code>ec55dc8</code></a> Merge pull request <a href="https://redirect.github.com/attestantio/go-eth2-client/issues/145">#145</a> from attestantio/per-call-ssz</li>
<li><a href="https://github.com/attestantio/go-eth2-client/commit/2d6d5b48577cb45d053d1ad2450f8339c4cf99cf"><code>2d6d5b4</code></a> Support SSZ on a per-call basis.</li>
<li><a href="https://github.com/attestantio/go-eth2-client/commit/770ba2bcd9d2ee0b64b35373d6d2be112478f4ed"><code>770ba2b</code></a> Linting.</li>
<li>See full diff in <a href="https://github.com/attestantio/go-eth2-client/compare/v0.21.5...v0.21.6">compare view</a></li>
</ul>
</details>
<br />


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</details>

go.mod

@@ -3,7 +3,7 @@ module github.com/obolnetwork/charon
 go 1.22
 
 require (
-	github.com/attestantio/go-eth2-client v0.21.5
+	github.com/attestantio/go-eth2-client v0.21.6
 	github.com/bufbuild/buf v1.32.2
 	github.com/coinbase/kryptology v1.5.6-0.20220316191335-269410e1b06b
 	github.com/decred/dcrd/dcrec/secp256k1/v4 v4.3.0

go.sum

@@ -30,8 +30,8 @@ github.com/ObolNetwork/kryptology v0.0.0-20231016091344-eed023b6cac8/go.mod h1:q
 github.com/anmitsu/go-shlex v0.0.0-20161002113705-648efa622239/go.mod h1:2FmKhYUyUczH0OGQWaF5ceTx0UBShxjsH6f8oGKYe2c=
 github.com/antlr4-go/antlr/v4 v4.13.0 h1:lxCg3LAv+EUK6t1i0y1V6/SLeUi0eKEKdhQAlS8TVTI=
 github.com/antlr4-go/antlr/v4 v4.13.0/go.mod h1:pfChB/xh/Unjila75QW7+VU4TSnWnnk9UTnmpPaOR2g=
-github.com/attestantio/go-eth2-client v0.21.5 h1:QP6p7uLaWvevF72T+1707Na2oGDHvcv3JbC+eLwgTvA=
-github.com/attestantio/go-eth2-client v0.21.5/go.mod h1:d7ZPNrMX8jLfIgML5u7QZxFo2AukLM+5m08iMaLdqb8=
+github.com/attestantio/go-eth2-client v0.21.6 h1:eLhQ/OFHPhWrT7LYERL1Z6EPOoec6fJeDHsjjn73KBg=
+github.com/attestantio/go-eth2-client v0.21.6/go.mod h1:d7ZPNrMX8jLfIgML5u7QZxFo2AukLM+5m08iMaLdqb8=
 github.com/benbjohnson/clock v1.1.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
 github.com/benbjohnson/clock v1.3.0/go.mod h1:J11/hYXuz8f4ySSvYwY0FKfm+ezbsZBKZxNJlLklBHA=
 github.com/benbjohnson/clock v1.3.5 h1:VvXlSJBzZpA/zum6Sj74hxwYI2DIxRWuNIoXAzHZz5o=