NEP29: Test PyGMT on NumPy 1.25 (#2581)

Bumps [numpy](https://github.com/numpy/numpy) from 1.24.3 to 1.25.0 released on 18 Jun 2023.
- [Release notes](https://github.com/numpy/numpy/releases)
- [Changelog](https://numpy.org/doc/1.25/release/1.25.0-notes.html)
- [Commits](numpy/numpy@v1.24.3...v1.25.0)

Author: weiji14

.github/workflows/ci_tests.yaml

@@ -59,14 +59,14 @@ jobs:
             isDraft: true
           - os: windows-latest
             isDraft: true
-        # Pair Python 3.9 with NumPy 1.21 and Python 3.11 with NumPy 1.24
-        # Only install optional packages on Python 3.11/NumPy 1.24
+        # Pair Python 3.9 with NumPy 1.21 and Python 3.11 with NumPy 1.25
+        # Only install optional packages on Python 3.11/NumPy 1.25
         include:
           - python-version: '3.9'
             numpy-version: '1.21'
             optional-packages: ''
           - python-version: '3.11'
-            numpy-version: '1.24'
+            numpy-version: '1.25'
             optional-packages: ' contextily geopandas ipython rioxarray sphinx-gallery'
 
     timeout-minutes: 30