Update float64.mdx

Author: robin-norwood

website/docs/plugin/framework/functions/parameters/float64.mdx

@@ -2,7 +2,7 @@
 page_title: Float64 function parameters
 description: >-
   Learn how to use the 64-bit floating point function parameter type with the
-  Terraform provider framework.
+  Terraform plugin framework.
 ---
 
 # Float64 function parameters