ci: Use latest RAT release

RAT 0.16.1 was released so we no longer need to use snapshots
for SPDX support.

.github/workflows/compliance_check.yml

@@ -51,15 +51,11 @@ jobs:
       - name: Install Dependencies
         shell: bash
         run: |
-             sudo apt-get update
-             sudo apt-get install -y libxml2-utils
              mkdir repos
              git clone --depth=1 https://github.com/apache/mynewt-core repos/apache-mynewt-core
-             wget https://repository.apache.org/content/repositories/snapshots/org/apache/rat/apache-rat/maven-metadata.xml -O snapshot.xml
-             SNAPSHOT=`xmllint --xpath "//latest/text()" snapshot.xml`
-             wget https://repository.apache.org/content/repositories/snapshots/org/apache/rat/apache-rat/$SNAPSHOT/maven-metadata.xml -O version.xml
-             VERSION=`xmllint --xpath "//snapshotVersion[1]/value/text()" version.xml`
-             wget https://repository.apache.org/content/repositories/snapshots/org/apache/rat/apache-rat/$SNAPSHOT/apache-rat-$VERSION.jar -O apache-rat.jar
+             wget https://dlcdn.apache.org//creadur/apache-rat-0.16.1/apache-rat-0.16.1-bin.tar.gz
+             tar zxf apache-rat-0.16.1-bin.tar.gz apache-rat-0.16.1/apache-rat-0.16.1.jar
+             mv apache-rat-0.16.1/apache-rat-0.16.1.jar apache-rat.jar
       - name: check licensing
         shell: bash
         run: |