Always install the correct version with pip_build (keras-team#595)

pip_build while create whl files in `/dist`, which aren't cleaned up
by the script unless you do so manually.

The script would install the first `.whl` it saw in `/dist`, which means
if you have been building multiple versions of keras-core, the install
script might grab the wrong one.

This makes sure to always grab the correct versioned `.whl`. Alternately
we could clear the `/dist` dir each time we build.

pip_build.py

@@ -81,7 +81,7 @@ def build():
 
         # Find the .whl file path
         for fname in os.listdir(dist_directory):
-            if fname.endswith(".whl"):
+            if __version__ in fname and fname.endswith(".whl"):
                 whl_path = os.path.abspath(os.path.join(dist_directory, fname))
         print(f"Build successful. Wheel file available at {whl_path}")
     finally: