Update index.md

Author: twrobinson

docs/software/prgenv/index.md

@@ -16,7 +16,7 @@ CSCS provides "programming environments" on Alps vClusters that provide compiler
 
 -   :fontawesome-solid-layer-group: [__linalg__][ref-uenv-linalg]
 
-    Provides linear compilers, MPI and Python, along with algebra and mesh partitioning libraries for a broad range of use cases.
+    Provides compilers, MPI and Python, along with linear algebra and mesh partitioning libraries for a broad range of use cases.
 
 -   :fontawesome-solid-layer-group: [__Cray Programming Environment__][ref-cpe]