MINOR: Fix withLogicalTypeAnnotation Javadoc @return description

[anxkhn]

Rationale for this change

The @return tag on the public method
PrimitiveType.withLogicalTypeAnnotation(LogicalTypeAnnotation) reads:

@return a new PrimitiveType with the same fields and a new id null

That description is self-contradicting ("a new id null") and factually wrong. The
method body is:

public PrimitiveType withLogicalTypeAnnotation(LogicalTypeAnnotation logicalType) {
  return new PrimitiveType(getRepetition(), primitive, length, getName(), logicalType, getId());
}

It passes getId() straight through to the constructor, so the existing field id
is preserved unchanged; only the logical type annotation is replaced. The method
never assigns a new id and never nulls it.

The wording is a mangled copy-paste from the sibling withId(int) method just
above it, whose @return a new PrimitiveType with the same fields and a new id is
correct there because withId passes new ID(id).

What changes are included in this PR?

A single-line Javadoc correction on that @return tag (in
parquet-column/src/main/java/org/apache/parquet/schema/PrimitiveType.java):

   /**
    * @param logicalType LogicalTypeAnnotation
-   * @return a new PrimitiveType with the same fields and a new id null
+   * @return a new PrimitiveType with the same fields and the given logical type annotation
    */
   public PrimitiveType withLogicalTypeAnnotation(LogicalTypeAnnotation logicalType) {

No code behavior changes.

Are these changes tested?

No new test. This is a Javadoc @return correction with no runtime behavior
change, so a unit test would not assert anything meaningful. I confirmed the
module still builds and produces valid Javadoc:

• mvn -pl parquet-column spotless:check -> BUILD SUCCESS (palantir-java-format
  gate passes)
• mvn -pl parquet-column -am -DskipTests package -> BUILD SUCCESS
• mvn -pl parquet-column javadoc:javadoc -> BUILD SUCCESS (no new warnings; the
  corrected @return tag is well-formed)

Are there any user-facing changes?

No. Documentation (Javadoc) only; no API or behavior change.