doc: add old filename with strikethrough.

Co-authored-by: Jhedie <jeddiahawuku12@gmail.com>

Author: Esh07

README.md

@@ -2,7 +2,7 @@
 
 This is a [Heroku buildpack](http://devcenter.heroku.com/articles/buildpacks).
 
-This buildpack will place precompiled `libmsodbcsql-18.3.so.1.1` and ~`msodbcsqlr18.rll`~ files in locations so Heroku can read the `ODBC Driver 18 for SQL Server` driver for python `pyodbc`. This driver is version 18.5.
+This buildpack will place precompiled ~`libmsodbcsql-17.5.so.2.1`~ `libmsodbcsql-18.3.so.1.1` and ~`msodbcsqlr17.rll`~ `msodbcsqlr18.rll` files in locations so Heroku can read the `ODBC Driver 18 for SQL Server` driver for python `pyodbc`. This driver is version 18.5.
 
 # Requirements