chore(deps): Update toml requirement from 0.7 to 0.8 (#459)

Updates the requirements on [toml](https://github.com/toml-rs/toml) to
permit the latest version.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="310f6ee9c5"><code>310f6ee</code></a>
chore: Release</li>
<li><a
href="90da8bc425"><code>90da8bc</code></a>
docs: Update changelog</li>
<li><a
href="f3e120f1a0"><code>f3e120f</code></a>
Merge pull request <a
href="https://redirect.github.com/toml-rs/toml/issues/608">#608</a> from
epage/enum</li>
<li><a
href="58a7101f68"><code>58a7101</code></a>
fix(serde): Support struct variants as table of a table</li>
<li><a
href="88a4dba312"><code>88a4dba</code></a>
fix(serde): Support tuple variants as table of an array</li>
<li><a
href="cf06b83424"><code>cf06b83</code></a>
test(serde): Verify both Table and Value serializers</li>
<li><a
href="4ffa44ec16"><code>4ffa44e</code></a>
test(serde): Make parameter order more consistent</li>
<li><a
href="2b7c34c900"><code>2b7c34c</code></a>
test(serde): Focus on string serialization first</li>
<li><a
href="e2a6a1cece"><code>e2a6a1c</code></a>
test(serde): Verify existing variant behavior</li>
<li><a
href="3f3e8329bb"><code>3f3e832</code></a>
chore: Release</li>
<li>Additional commits viewable in <a
href="https://github.com/toml-rs/toml/compare/toml-v0.7.0...toml-v0.8.0">compare
view</a></li>
</ul>
</details>
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runtime/Cargo.toml

@@ -15,7 +15,7 @@ wasmtime-wasi-nn = {version = ">= 10.0.0, < 13.0.0", optional=true}
 anyhow = "1"
 serde = {version = "1", features = ["derive"]}
 serde_json = "1"
-toml = "0.7"
+toml = "0.8"
 sha2 = "0.10"
 log = "0.4"
 log4rs = "1.1"