⬆️ Bump com.bybutter.sisyphus:sisyphus-jackson-protobuf (#211)

Bumps [com.bybutter.sisyphus:sisyphus-jackson-protobuf](https://github.com/ButterCam/sisyphus) from 2.1.20 to 2.1.21.
- [Release notes](https://github.com/ButterCam/sisyphus/releases)
- [Changelog](https://github.com/ButterCam/sisyphus/blob/master/CHANGELOG.md)
- [Commits](ButterCam/sisyphus@2.1.20...2.1.21)

---
updated-dependencies:
- dependency-name: com.bybutter.sisyphus:sisyphus-jackson-protobuf
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build.gradle.kts

@@ -35,7 +35,7 @@ dependencies {
     implementation("org.commonmark:commonmark-ext-gfm-tables:0.21.0")
     implementation("org.commonmark:commonmark-ext-autolink:0.21.0")
     implementation("com.bybutter.sisyphus:sisyphus-grpc:2.1.20")
-    implementation("com.bybutter.sisyphus:sisyphus-jackson-protobuf:2.1.20")
+    implementation("com.bybutter.sisyphus:sisyphus-jackson-protobuf:2.1.21")
     implementation("com.fasterxml.jackson.dataformat:jackson-dataformat-yaml:2.16.0")
     implementation("io.grpc:grpc-netty:1.59.0")
 }