Fix lingering reference to 1.16

Author: connorsmacd

README.md

@@ -106,7 +106,7 @@ See [releasing](./doc/releasing.md).
 Distribution packages (i.e., .deb/.rpm) are built and published for several Linux distributions.  The installation of these packages for supported platforms is documented here.
 
 ### Unstable Development Distribution Packages ###
-To install the latest unstable development package, change `1.17` to `development` in the package URLs listed in the subsequent instructions. For example, `https://libmongocrypt.s3.amazonaws.com/apt/ubuntu <release>/libmongocrypt/1.16` in the instructions would become `https://libmongocrypt.s3.amazonaws.com/apt/ubuntu <release>/libmongocrypt/development`. Do not use the unstable version of libmongocrypt in a production environment.
+To install the latest unstable development package, change `1.17` to `development` in the package URLs listed in the subsequent instructions. For example, `https://libmongocrypt.s3.amazonaws.com/apt/ubuntu <release>/libmongocrypt/1.17` in the instructions would become `https://libmongocrypt.s3.amazonaws.com/apt/ubuntu <release>/libmongocrypt/development`. Do not use the unstable version of libmongocrypt in a production environment.
 
 ### .deb Packages (Debian and Ubuntu) ###