Correct misleading capacity Javadoc in CHMCache

The CHMCache(int) parameter doc claimed the cache evicts entries once
capacity is reached. There is no eviction policy: as the class-level
Javadoc and the implementation show, the cache simply stops accepting
new entries once it is full.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Author: oschwald

src/main/java/com/maxmind/db/CHMCache.java

@@ -27,8 +27,8 @@ public CHMCache() {
      * Creates a new cache with the specified capacity.
      *
      * @param capacity
-     *            the maximum number of elements the cache can hold before
-     *            starting to evict them
+     *            the maximum number of elements the cache can hold before it
+     *            stops accepting new entries
      */
     public CHMCache(int capacity) {
         this.capacity = capacity;