docs: load library with Arena.global()

Closes #29

Author: ObserverOfTime

src/main/java/io/github/treesitter/jtreesitter/Language.java

@@ -59,12 +59,9 @@ private static UnsatisfiedLinkError unresolved(String name) {
      * <h4 id="load-example">Example</h4>
      *
      * <p>{@snippet lang="java" :
-     * Language language;
-     * try (Arena arena = Arena.ofConfined()) {
-     *    String library = System.mapLibraryName("tree-sitter-java");
-     *    SymbolLookup symbols = SymbolLookup.libraryLookup(library, arena);
-     *    language = Language.load(symbols, "tree_sitter_java");
-     * }
+     * String library = System.mapLibraryName("tree-sitter-java");
+     * SymbolLookup symbols = SymbolLookup.libraryLookup(library, Arena.global());
+     * Language language = Language.load(symbols, "tree_sitter_java");
      * }
      *
      * @throws RuntimeException If the language could not be loaded.

src/main/java/io/github/treesitter/jtreesitter/package-info.java

@@ -30,5 +30,7 @@
  *     }
  * }
  *}
+ *
+ * @see <a href="https://github.com/openjdk/jextract/blob/master/doc/GUIDE.md#library-loading">Library Loading</a>
  */
 package io.github.treesitter.jtreesitter;