Bump appengine-api-1.0-sdk from 1.9.38 to 2.0.6

Bumps [appengine-api-1.0-sdk](https://github.com/GoogleCloudPlatform/appengine-java-standard) from 1.9.38 to 2.0.6.
- [Release notes](https://github.com/GoogleCloudPlatform/appengine-java-standard/releases)
- [Commits](https://github.com/GoogleCloudPlatform/appengine-java-standard/commits/v2.0.6)

---
updated-dependencies:
- dependency-name: com.google.appengine:appengine-api-1.0-sdk
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

build.gradle

@@ -44,7 +44,7 @@ dependencies {
     compileOnly 'javax.servlet:servlet-api:2.5'
     compileOnly 'com.squareup.okhttp:okhttp:2.7.5'  // support both v2 and v3 to avoid
     compileOnly 'com.squareup.okhttp3:okhttp:4.10.0' // method count bloat
-    compileOnly 'com.google.appengine:appengine-api-1.0-sdk:1.9.38'
+    compileOnly 'com.google.appengine:appengine-api-1.0-sdk:2.0.6'
 
     testImplementation 'org.testng:testng:6.9.10'
     testImplementation 'org.mockito:mockito-core:1.10.19'