[v10.0.x] Docs: fixed incorrect TLS entry for mysql data source (#72556)

Docs:  fixed incorrect TLS entry for mysql data source (#72543)

fixed tls skip verify

(cherry picked from commit 5e4000b6e9)

Co-authored-by: lwandz13 <126723338+lwandz13@users.noreply.github.com>

docs/sources/datasources/mysql/_index.md

@@ -154,7 +154,7 @@ datasources:
     user: grafana
     jsonData:
       tlsAuth: true
-      skipTLSVerify: true
+      tlsSkipVerify: true
       database: grafana
       maxOpenConns: 100 # Grafana v5.4+
       maxIdleConns: 100 # Grafana v5.4+