Fixes TypeError when casting arrays to scalar with Numpy>=2.4 (#1264)

* Applies fix

* Apply suggestion from @spjuhel

* Apply suggestion from @emanuel-schmid

Co-authored-by: Emanuel Schmid <51439563+emanuel-schmid@users.noreply.github.com>

---------

Co-authored-by: Emanuel Schmid <51439563+emanuel-schmid@users.noreply.github.com>

Author: spjuhel

climada/hazard/tc_tracks_synth.py

@@ -1049,7 +1049,7 @@ def _apply_decay_coeffs(track, v_rel, p_rel, land_geom, s_rel):
                 # if there is no further landfall, correct until the end of
                 # the track
                 end_cor = track["time"].size
-            rndn = 0.1 * float(np.abs(np.random.normal(size=1) * 5) + 6)
+            rndn = 0.1 * float(np.abs(np.random.default_rng().normal() * 5) + 6)
             r_diff = (
                 track["central_pressure"][land_sea].values
                 - track["central_pressure"][land_sea - 1].values

climada/util/hdf5_handler.py

@@ -89,7 +89,7 @@ def get_string(array):
     -------
     string
     """
-    return "".join(chr(int(c)) for c in array)
+    return "".join(chr(c.item()) for c in array)
 
 
 def get_str_from_ref(file_name, var):