Fix javadoc

Author: damianmalczewski

problem4j-core/src/main/java/io/github/problem4j/core/AbstractProblemMapper.java

@@ -255,7 +255,8 @@ protected void applyExtensionsOnBuilder(
    *
    * <ul>
    *   <li>{@code message} - throwable message
-   *   <li>{@code context.traceId} - trace ID from context
+   *   <li>{@code {context.*}} -> value from {@link ProblemContext} included in {@link
+   *       ProblemMapper} methods
    *   <li>Any other token - value of a matching field in the throwable class hierarchy
    * </ul>
    *

problem4j-core/src/main/java/io/github/problem4j/core/ProblemMapping.java

@@ -31,8 +31,8 @@
  *
  * <ul>
  *   <li>{@code {message}} -> the exception's {@link Throwable#getMessage()}
- *   <li>{@code {context.traceId}} -> the traceId from {@code ProblemContext#getTraceId()} (special
- *       shorthand)
+ *   <li>{@code {context.*}} -> value from {@link ProblemContext} included in {@link ProblemMapper}
+ *       methods
  *   <li>{@code {fieldName}} -> value of any field (private or public) in the exception class
  *       hierarchy
  *   <li>Any placeholder that resolves to null or an empty string is ignored in the final output
@@ -94,7 +94,8 @@
    *
    * <ul>
    *   <li>{@code {message}} -> exception message
-   *   <li>{@code {context.traceId}} -> trace ID from {@code ProblemContext}
+   *   <li>{@code {context.*}} -> value from {@link ProblemContext} included in {@link
+   *       ProblemMapper} methods
    *   <li>{@code {fieldName}} -> value of any field in the exception class hierarchy
    * </ul>
    *