ci: build on the latest JDK (25)

Gradle 9.6.1 + AGP 9.2.1 run on JDK 25; Kotlin stays 2.3.0 (AGP-mandated).

Author: ajsb85

.github/workflows/ci.yml

@@ -22,7 +22,7 @@ jobs:
       - uses: actions/setup-java@v5
         with:
           distribution: temurin
-          java-version: "17"
+          java-version: "25"
       - uses: android-actions/setup-android@v4
       - name: Install SDK packages
         run: sdkmanager "platforms;android-35" "build-tools;36.0.0"
@@ -44,7 +44,7 @@ jobs:
       - uses: actions/setup-java@v5
         with:
           distribution: temurin
-          java-version: "17"
+          java-version: "25"
       - uses: android-actions/setup-android@v4
       - name: Install SDK packages
         run: sdkmanager "platforms;android-35" "build-tools;36.0.0"

.github/workflows/publish-maven.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: actions/setup-java@v5
         with:
           distribution: temurin
-          java-version: "17"
+          java-version: "25"
       - uses: android-actions/setup-android@v4
       - name: Install SDK packages
         run: sdkmanager "platforms;android-35" "build-tools;36.0.0"

.github/workflows/release-aar.yml

@@ -18,7 +18,7 @@ jobs:
       - uses: actions/setup-java@v5
         with:
           distribution: temurin
-          java-version: "17"
+          java-version: "25"
       - uses: android-actions/setup-android@v4
       - name: Install SDK packages
         run: sdkmanager "platforms;android-35" "build-tools;36.0.0"

CONTRIBUTING.md

@@ -4,8 +4,7 @@ Thanks for your interest in improving `cobs_codec_kt`!
 
 ## Getting started
 
-You need **JDK 17** and the **Android SDK** (`compileSdk 35`, `build-tools
-35.0.0`). The Gradle wrapper pins the Gradle version, so no separate Gradle
+You need **JDK 17 or newer** (CI builds on JDK 25) and the **Android SDK** (`compileSdk 35`, `build-tools 36.0.0`). The Gradle wrapper pins the Gradle version, so no separate Gradle
 install is needed.
 
 ```console

README.md

@@ -95,7 +95,8 @@ Invalid encoded input throws `CobsDecodeException`.
 
 ## Build
 
-Requires JDK 17 and the Android SDK (`compileSdk 35`).
+Requires JDK 17 or newer (CI builds on JDK 25) and the Android SDK
+(`compileSdk 35`).
 
 ```console
 ./gradlew :cobs:assembleRelease   # -> cobs/build/outputs/aar/cobs-release.aar