DEV: fix code example on INCRBYFLOAT command page (#1056)

Author: dwdougherty

content/commands/incrbyfloat/index.md

@@ -81,11 +81,11 @@ regardless of the actual internal precision of the computation.
 ## Examples
 
 {{% redis-cli %}}
-SET mykey 10.50
-INCRBYFLOAT mykey 0.1
-INCRBYFLOAT mykey -5
-SET mykey 5.0e3
-INCRBYFLOAT mykey 2.0e2
+SET mykey "10.50"
+INCRBYFLOAT mykey "0.1"
+INCRBYFLOAT mykey "-5"
+SET mykey "5.0e3"
+INCRBYFLOAT mykey "2.0e2"
 {{% /redis-cli %}}