Bump cel-bom from 0.3.17 to 0.3.18 (#619)

planetiler-custommap/pom.xml

@@ -45,7 +45,7 @@
       <dependency>
         <groupId>org.projectnessie.cel</groupId>
         <artifactId>cel-bom</artifactId>
-        <version>0.3.17</version>
+        <version>0.3.18</version>
         <type>pom</type>
         <scope>import</scope>
       </dependency>