Fix license SPDX id

Author: epou

pyproject.toml

@@ -5,7 +5,7 @@ description = "Mosquito Alert API"
 authors = [
   {name = "Developers",email = "[email protected]"},
 ]
-license = "GPL-3"
+license = "GPL-3.0-only"
 readme = "README.md"
 keywords = ["OpenAPI", "OpenAPI-Generator", "Mosquito Alert API"]
 requires-python = ">=3.9"

setup.py

@@ -42,7 +42,7 @@
     install_requires=REQUIRES,
     packages=find_packages(exclude=["test", "tests"]),
     include_package_data=True,
-    license="GPL-3",
+    license="GPL-3.0-only",
     long_description_content_type='text/markdown',
     long_description="""\
     Introducing API v1 for Mosquito Alert platform, a project desgined to facilitate citizen science initiatives and enable collaboration among scientists, public health officials, and environmental managers in the investigation and control of disease-carrying mosquitoes.