Update cran-comments

cran-comments.md

+## Change in the maintainer's email address
+I recently learned that my old address (sebastian.henz@ufz.de) is probably 
+going to get deactivated in a few months. To ensure long-term maintainability 
+of the package I changed the address to one that will remain active for the 
+foreseeable future. I have sent a confirmation from the old address to
+CRAN-submissions@R-project.org.
+
 ## Test environments
-* local Windows 10 install, R 4.0.2
-* win-builder, R devel
-* Debian GNU/Linux 9 on GitLab CI, R 3.5.1
-* Debian GNU/Linux 10 on GitLab CI, R 3.6.3
-* Ubuntu 20.04 on GitLab CI, R 4.0.2
-* Ubuntu 20.04 on GitLab CI, R devel (2020-07-21 r78893)
+* local Windows 10 installation, R 4.0.2
+* Ubuntu Linux 16.04 LTS on R-hub, R-release
+* Windows Server 2008 R2 SP1 on R-hub, R-devel
+* Ubuntu 20.04 LTS on GitLab-CI, R 4.0.2
+* Ubuntu 20.04 LTS on GitLab-CI, R devel (2020-08-18 r79041)
+* Debian GNU/Linux 10 on GitLab-CI, R 3.6.3
+* Debian GNU/Linux 9 on GitLab-CI, R 3.5.1
 
 ## R CMD check results
-There were no errors, warnings, or notes. 
+There were no errors or warnings.
+One note came up: "unable to verify current time". I believe this is 
+not caused by my package but instead by how R checks timestamps.
 
 ## Downstream dependencies
 There are no downstream dependencies yet.