CI: Update oldest numpy

Author: CSSFrancis

.github/workflows/build.yml

@@ -46,7 +46,7 @@ jobs:
           - os: ubuntu-latest
             python-version: 3.9
             OLDEST_SUPPORTED_VERSION: true
-            DEPENDENCIES: diffpy.structure==3.0.2 matplotlib==3.5 numpy==1.26.4 orix==0.12.1 scipy==1.8 tqdm==4.61.2
+            DEPENDENCIES: diffpy.structure==3.0.2 matplotlib==3.7 numpy==1.24 orix==0.12.1 scipy==1.10 tqdm==4.61.2
             LABEL: -oldest
     steps:
       - uses: actions/checkout@v4