Clarify Linux TOC

Author: rick-man

articles/virtual-machines/linux/toc.yml

@@ -154,7 +154,7 @@
         href: ../nvv3-series.md?toc=/azure/virtual-machines/linux/toc.json&bc=/azure/virtual-machines/linux/breadcrumb/toc.json
       - name: NVv4-series
         href: ../nvv4-series.md?toc=/azure/virtual-machines/linux/toc.json&bc=/azure/virtual-machines/linux/breadcrumb/toc.json
-      - name: Setup GPU drivers
+      - name: Setup NVIDIA GPU drivers
         href: n-series-driver-setup.md
     - name: High performance compute
       displayName: H-series