Collapse catch clauses

Use multi-catch for exceptions whenever possible.

See gh-9781

spring-boot-cli/src/main/java/org/springframework/boot/cli/compiler/grape/AetherGrapeEngine.java

@@ -131,10 +131,7 @@ public class AetherGrapeEngine implements GrapeEngine {
 				classLoader.addURL(file.toURI().toURL());
 			}
 		}
-		catch (ArtifactResolutionException ex) {
-			throw new DependencyResolutionFailedException(ex);
-		}
-		catch (MalformedURLException ex) {
+		catch (ArtifactResolutionException | MalformedURLException ex) {
 			throw new DependencyResolutionFailedException(ex);
 		}
 		return null;