update gradle to version 7.6
diff --git a/lib/java/README.md b/lib/java/README.md
index 7005c60..5d9b123 100644
--- a/lib/java/README.md
+++ b/lib/java/README.md
@@ -50,13 +50,13 @@
following this step (which is also done in the travis CI docker images):
```bash
-export GRADLE_VERSION="7.5.1"
+export GRADLE_VERSION="7.6"
# install dependencies
apt-get install -y --no-install-recommends openjdk-17-jdk-headless wget unzip
# download gradle distribution
wget https://services.gradle.org/distributions/gradle-$GRADLE_VERSION-bin.zip -q -O /tmp/gradle-$GRADLE_VERSION-bin.zip
# check binary integrity
-echo "f6b8596b10cce501591e92f229816aa4046424f3b24d771751b06779d58c8ec4 /tmp/gradle-$GRADLE_VERSION-bin.zip" | sha256sum -c -
+echo "03c0f018d043de73187fe87d1798f4c8f494aceed1c6158b0919367926a19e4d /tmp/gradle-$GRADLE_VERSION-bin.zip" | sha256sum -c -
# unzip and install
unzip -d /tmp /tmp/gradle-$GRADLE_VERSION-bin.zip
mv /tmp/gradle-$GRADLE_VERSION /usr/local/gradle