Update api diff during release automation (#12039)

Author: trask

.github/scripts/update-version.sh

@@ -21,3 +21,5 @@ sed -Ei "s/(opentelemetryJavaagentAlpha *: )\"[^\"]*\"/\1\"$alpha_version\"/" ex
 
 sed -Ei "s/(io.opentelemetry.instrumentation.muzzle-generation\" version )\"[^\"]*\"/\1\"$alpha_version\"/" examples/extension/build.gradle
 sed -Ei "s/(io.opentelemetry.instrumentation.muzzle-check\" version )\"[^\"]*\"/\1\"$alpha_version\"/" examples/extension/build.gradle
+
+sed -Ei "1 s/(Comparing source compatibility of [a-z-]+)-[0-9]+\.[0-9]+\.[0-9]+(-SNAPSHOT)?.jar/\1-$version.jar/" docs/apidiffs/current_vs_latest/*.txt