Update to quiche sha of 0.20.0 (java-native-access#636)

Motivation:

Quiche did a new release.

Modifications:

Change sha to the commit that points to 0.20.0

Result:

Use latest quiche release

codec-native-quic/pom.xml

@@ -56,7 +56,7 @@
     <quicheHomeIncludeDir>${quicheHomeDir}/quiche/include</quicheHomeIncludeDir>
     <quicheRepository>https://github.com/cloudflare/quiche</quicheRepository>
     <quicheBranch>master</quicheBranch>
-    <quicheCommitSha>b0944d88882e412685554446e6209c317b6f912b</quicheCommitSha>
+    <quicheCommitSha>5b1e3d286411e2cc411f8dc6d6ff1ee40f1bd026</quicheCommitSha>
     <generatedSourcesDir>${project.build.directory}/generated-sources</generatedSourcesDir>
     <templateDir>${project.build.directory}/template</templateDir>
     <cargoTarget />