doc(README): add link to deployed documentation

Author: everythingfunctional

README.md

@@ -17,7 +17,7 @@ DAG is based on a fork of [daglib by Jacob Williams], refactored to
 * Add build system and test harness automated by [fpm],
 * Add unit testing written with [Vegetables], 
 * Add continuous-integration testing and documentation deployment via [GitHub Actions], 
-* Add ocumentation generated by [FORD], 
+* Add [documentation] generated by [FORD], 
 * Add runtime assertion-checking using [Assert], and
 * Add [JSON] file input/output using [jsonff].  
 
@@ -104,3 +104,4 @@ This library is released under a [BSD-3 license].
 [print-to-json.f90]: ./example/print-to-json.f90
 [read-from-json.f90]:./example/read-from-json.f90
 [dag-to-dot.f90]: ./example/dag-to-dot.f90
+[documentation]: https://sourceryinstitute.github.io/dag/