Fix suites parameter for R-project repo (must have trailing slash if no components specified)

Remove r_version
Remove r_pin_version default

	modified:   README.md
	modified:   defaults/main.yml

README.md

@@ -11,8 +11,6 @@ Ubuntu
 Role Variables
 --------------
 
-    r_version:
-      R version to install (default: 4.4.0)
     r_repo:
       Base R repository configuration (default: r-project.org, deb822
       parameters)

defaults/main.yml

 ---
 # roles/r/defaults/main.yml
 
-r_version: '4.4.0'
 r_repo_default:
   name: 'cran_r'
   uris: 'https://cloud.r-project.org/bin/linux/ubuntu'
   signed_by: 'https://cloud.r-project.org/bin/linux/ubuntu/marutter_pubkey.asc'
   types: 'deb'
-  suites: "{{ ansible_distribution_release }}-cran40"
+  suites: "{{ ansible_distribution_release }}-cran40/"
 r_repo: {}
 
 # https://github.com/eddelbuettel/r2u:
@@ -23,7 +22,6 @@ r_repo_extra:
 r_pkgs:
     - "r-base"
     - "r-recommended"
-r_pin_version: "{{ r_version }}"
 
 r_extra_pkgs:
     - r-cran-tidyverse