Updating TOC typo

Author: VesaJuvonen

docs/toc.yml

@@ -456,7 +456,7 @@
     items:
     - name: Overview
       href: spfx/roadmap.md
-    - name: SPFx v1.14 - March 8, 2022
+    - name: SPFx v1.15 - March 8, 2022
       href: spfx/release-1.15.md      
     - name: SPFx v1.14 - February 17, 2022
       href: spfx/release-1.14.md