8284308: mismatch between key and content in compiler error message

Reviewed-by: mcimadamore

Author: Vicente Romero

src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties

@@ -2608,7 +2608,7 @@ compiler.misc.eq.bounds=\
 
 # 0: list of type
 compiler.misc.upper.bounds=\
-        lower bounds: {0}
+        upper bounds: {0}
 
 # 0: list of type, 1: type, 2: type
 compiler.misc.infer.no.conforming.instance.exists=\