build: bump jacoco-maven-plugin 0.8.14 -> 0.8.15

Latest stable JaCoCo release (2026-05-13). Drop-in bump; restores exec
file compatibility with versions 0.7.5-0.8.8 for class files with zero
line numbers and pulls in ASM 9.6.

Author: claude

pom.xml

@@ -184,7 +184,7 @@ SPDX-License-Identifier: MIT
 			<plugin>
 				<groupId>org.jacoco</groupId>
 				<artifactId>jacoco-maven-plugin</artifactId>
-				<version>0.8.14</version>
+				<version>0.8.15</version>
 				<executions>
 					<execution>
 						<id>prepare-agent</id>