patch: update tools versions

Author: github-actions[bot]

install.sh

@@ -2,8 +2,8 @@
 
 set -e
 
-PMD_RELEASE="https://github.com/pmd/pmd/releases/download/pmd_releases/7.20.0/pmd-dist-7.20.0-bin.zip"
-CHECKSTYLE_RELEASE="https://github.com/checkstyle/checkstyle/releases/download/checkstyle-13.0.0/checkstyle-13.0.0-all.jar"
+PMD_RELEASE="https://github.com/pmd/pmd/releases/download/pmd_releases/7.21.0/pmd-dist-7.21.0-bin.zip"
+CHECKSTYLE_RELEASE="https://github.com/checkstyle/checkstyle/releases/download/checkstyle-13.1.0/checkstyle-13.1.0-all.jar"
 
 apt-get update && apt-get install --no-install-recommends -y ca-certificates wget unzip curl bash jq