deps: bump io.papermc.paper:paper-api (#222)

Bumps io.papermc.paper:paper-api from 1.21.3-R0.1-SNAPSHOT to 1.21.4-R0.1-SNAPSHOT.

---
updated-dependencies:
- dependency-name: io.papermc.paper:paper-api
  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

@@ -64,12 +64,12 @@ repositories {
 }
 
 dependencies {
-    compileOnly 'io.papermc.paper:paper-api:1.21.3-R0.1-SNAPSHOT'
+    compileOnly 'io.papermc.paper:paper-api:1.21.4-R0.1-SNAPSHOT'
     compileOnly 'com.github.spotbugs:spotbugs-annotations:4.8.6'
     implementation 'io.papermc:paperlib:1.0.8'
     spotbugsPlugins 'com.h3xstream.findsecbugs:findsecbugs-plugin:1.13.0'
     testCompileOnly 'com.github.spotbugs:spotbugs-annotations:4.8.6'
-    testImplementation 'io.papermc.paper:paper-api:1.21.3-R0.1-SNAPSHOT'
+    testImplementation 'io.papermc.paper:paper-api:1.21.4-R0.1-SNAPSHOT'
     testImplementation 'org.junit.jupiter:junit-jupiter:5.11.3'
     testRuntimeOnly 'org.junit.platform:junit-platform-launcher:1.11.4'
 }