Fix requirements to build from Python 3.8

Build from Python 3.8 rather than 3.11 to maintain support for dependencies that no longer support older Python versions.

envs/requirements.txt

@@ -12,6 +12,8 @@ future==0.18.3
 idna==3.4
 imagecodecs==2023.3.16
 imageio==2.31.1
+importlib-metadata==6.7.0
+importlib-resources==5.12.0
 itk==5.3.0
 itk-core==5.3.0
 itk-elastix==0.17.1
@@ -29,7 +31,7 @@ matplotlib-scalebar==0.8.1
 mdurl==0.1.2
 meshio==5.3.4
 networkx==3.1
-numpy==1.25.0
+numpy==1.24.3
 packaging==23.1
 pandas==2.0.2
 Pillow==9.5.0
@@ -57,3 +59,4 @@ treelib==1.6.4
 typing_extensions==4.6.3
 tzdata==2023.3
 urllib3==2.0.3
+zipp==3.15.0