Bump com.google.errorprone:error_prone_core from 2.25.0 to 2.26.1

Bumps [com.google.errorprone:error_prone_core](https://github.com/google/error-prone) from 2.25.0 to 2.26.1.
- [Release notes](https://github.com/google/error-prone/releases)
- [Commits](google/error-prone@v2.25.0...v2.26.1)

---
updated-dependencies:
- dependency-name: com.google.errorprone:error_prone_core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

build.gradle.kts

@@ -72,7 +72,7 @@ dependencies {
     pitest(libs.pitest.dashboard.reporter)
     checkstyle("com.thomasjensen.checkstyle.addons:checkstyle-addons:7.0.1")
 
-    errorprone("com.google.errorprone:error_prone_core:2.25.0")
+    errorprone("com.google.errorprone:error_prone_core:2.26.1")
     errorprone("jp.skypencil.errorprone.slf4j:errorprone-slf4j:0.1.22")
 
     spotbugsSlf4j(rootProject.libs.slf4j.simple)