fix(core): bump golang.org/x/net from 0.17.0 to 0.23.0 in /lib/fixtures (#626)

Bumps [golang.org/x/net](https://github.com/golang/net) from 0.17.0 to
0.23.0.
<details>
<summary>Commits</summary>
<ul>
<li><a
href="https://github.com/golang/net/commit/c48da131589f122489348be5dfbcb6457640046f"><code>c48da13</code></a>
http2: fix TestServerContinuationFlood flakes</li>
<li><a
href="https://github.com/golang/net/commit/762b58d1cf6e0779780decad89c6c1523386638d"><code>762b58d</code></a>
http2: fix tipos in comment</li>
<li><a
href="https://github.com/golang/net/commit/ba872109ef2dc8f1da778651bd1fd3792d0e4587"><code>ba87210</code></a>
http2: close connections when receiving too many headers</li>
<li><a
href="https://github.com/golang/net/commit/ebc8168ac8ac742194df729305175940790c55a2"><code>ebc8168</code></a>
all: fix some typos</li>
<li><a
href="https://github.com/golang/net/commit/3678185f8a652e52864c44049a9ea96b7bcc066a"><code>3678185</code></a>
http2: make TestCanonicalHeaderCacheGrowth faster</li>
<li><a
href="https://github.com/golang/net/commit/448c44f9287b6745f958d74aa2a17ec7761c2f13"><code>448c44f</code></a>
http2: remove clientTester</li>
<li><a
href="https://github.com/golang/net/commit/c7877ac4213b2f859831366f5a35b353e0dc9f66"><code>c7877ac</code></a>
http2: convert the remaining clientTester tests to testClientConn</li>
<li><a
href="https://github.com/golang/net/commit/d8870b0bf2f2426fc8d19a9332f652da5c25418f"><code>d8870b0</code></a>
http2: use synthetic time in TestIdleConnTimeout</li>
<li><a
href="https://github.com/golang/net/commit/d73acffdc9493532acb85777105bb4a351eea702"><code>d73acff</code></a>
http2: only set up deadline when Server.IdleTimeout is positive</li>
<li><a
href="https://github.com/golang/net/commit/89f602b7bbf237abe0467031a18b42fc742ced08"><code>89f602b</code></a>
http2: validate client/outgoing trailers</li>
<li>Additional commits viewable in <a
href="https://github.com/golang/net/compare/v0.17.0...v0.23.0">compare
view</a></li>
</ul>
</details>
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lib/fixtures/go.mod

@@ -10,5 +10,5 @@ require (
 	github.com/opentracing/opentracing-go v1.2.0 // indirect
 	github.com/pkg/errors v0.9.1 // indirect
 	github.com/segmentio/ksuid v1.0.4 // indirect
-	golang.org/x/net v0.17.0 // indirect
+	golang.org/x/net v0.23.0 // indirect
 )

lib/fixtures/go.sum

@@ -19,11 +19,11 @@ github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+
 github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UVUgZn+9EI=
 github.com/stretchr/testify v1.8.2 h1:+h33VjcLVPDHtOdpUCuF+7gSuG3yGIftsP1YvFihtJ8=
 github.com/stretchr/testify v1.8.2/go.mod h1:w2LPCIKwWwSfY2zedu0+kehJoqGctiVI29o6fzry7u4=
-golang.org/x/crypto v0.17.0 h1:r8bRNjWL3GshPW3gkd+RpvzWrZAwPS49OmTGZ/uhM4k=
-golang.org/x/crypto v0.17.0/go.mod h1:gCAAfMLgwOJRpTjQ2zCCt2OcSfYMTeZVSRtQlPC7Nq4=
+golang.org/x/crypto v0.21.0 h1:X31++rzVUdKhX5sWmSOFZxx8UW/ldWx55cbf08iNAMA=
+golang.org/x/crypto v0.21.0/go.mod h1:0BP7YvVV9gBbVKyeTG0Gyn+gZm94bibOW5BjDEYAOMs=
 golang.org/x/net v0.0.0-20211029224645-99673261e6eb/go.mod h1:9nx3DQGgdP8bBQD5qxJ1jj9UTztislL4KSBs9R2vV5Y=
-golang.org/x/net v0.17.0 h1:pVaXccu2ozPjCXewfr1S7xza/zcXTity9cCdXQYSjIM=
-golang.org/x/net v0.17.0/go.mod h1:NxSsAGuq816PNPmqtQdLE42eU2Fs7NoRIZrHJAlaCOE=
+golang.org/x/net v0.23.0 h1:7EYJ93RZ9vYSZAIb2x3lnuvqO5zneoD6IvWjuhfxjTs=
+golang.org/x/net v0.23.0/go.mod h1:JKghWKKOSdJwpW2GEx0Ja7fmaKnMsbu+MWVZTokSYmg=
 golang.org/x/sys v0.0.0-20201119102817-f84b799fce68/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20210423082822-04245dca01da/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/term v0.0.0-20201126162022-7de9c90e9dd1/go.mod h1:bj7SfCRtBDWHUb9snDiAeCFNEtKQo2Wmx5Cou7ajbmo=