Merge pull request #453 from OneBusAway/claude/fix-warning-N5YNs

Fix missing maven-shade-plugin version warning

Author: aaronbrethorst

onebusaway-api-key-cli/pom.xml

@@ -81,7 +81,9 @@
     <build>
         <plugins>
             <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-shade-plugin</artifactId>
+                <version>${maven-shade-plugin-version}</version>
                 <executions>
                     <execution>
                         <phase>package</phase>