In [1]: import pygmt
   ...: fig = pygmt.Figure()
   ...: fig.basemap(region=[0, 10, 0, 10], frame=True)
   ...: fig.savefig("map.jpeg")
---------------------------------------------------------------------------
GMTInvalidInput                           Traceback (most recent call last)
Cell In[1], line 4
      2 fig = pygmt.Figure()
      3 fig.basemap(region=[0, 10, 0, 10], frame=True)
----> 4 fig.savefig("map.jpeg")

File /pygmt/figure.py:315, in Figure.savefig(self, fname, transparent, crop, anti_alias, show, **kwargs)
    310     if ext == "ps":
    311         raise GMTInvalidInput(
    312             "Extension '.ps' is not supported. "
    313             "Please use '.eps' or '.pdf' instead."
    314         )
--> 315     raise GMTInvalidInput(f"Unknown extension '.{ext}'.")
    316 fmt = fmts[ext]
    317 if transparent:

GMTInvalidInput: Unknown extension '.jpeg'.