update readme

[pawelru]

• remove link to r-universe - this fixes url-checker
• remove r-universe from install instructions for simplicity

[github-actions]

Code Coverage Summary

Filename                      Stmts    Miss  Cover    Missing
--------------------------  -------  ------  -------  -------------------------------------------------
R/basic_table_args.R             23       0  100.00%
R/draggable_buckets.R            82      82  0.00%    58-153
R/get_dt_rows.R                  13      13  0.00%    44-56
R/ggplot2_args.R                 49       0  100.00%
R/include_css_js.R                7       1  85.71%   17
R/nested_closeable_modal.R       16      16  0.00%    83-98
R/optionalInput.R               255     212  16.86%   149-447, 501, 554, 560, 575-588
R/panel_group.R                  90      90  0.00%    50-190
R/plot_with_settings.R          371      22  94.07%   282-295, 317, 354-355, 366-367, 641-642, 644, 646
R/standard_layout.R              35       0  100.00%
R/table_with_settings.R         173       1  99.42%   85
R/utils.R                        14       1  92.86%   7
R/verbatim_popup.R               99      49  50.51%   65-80, 106-107, 109, 117-145, 166
R/white_small_well.R              7       7  0.00%    19-25
TOTAL                          1234     494  59.97%

Diff against main

Filename      Stmts    Miss  Cover
----------  -------  ------  --------
TOTAL             0       0  +100.00%

Results for commit: e139038

Minimum allowed coverage is 80%

♻️ This comment has been updated with latest results

[github-actions]

Unit Tests Summary

  1 files   11 suites   1m 21s ⏱️
122 tests 122 ✅ 0 💤 0 ❌
334 runs  334 ✅ 0 💤 0 ❌

Results for commit e139038.

♻️ This comment has been updated with latest results.

[github-actions]

Unit Test Performance Difference

Test Suite	$Status$	Time on main	$±Time$	$±Tests$	$±Skipped$	$±Failures$	$±Errors$
plot_with_settings_ui	💚	$40.16$	$-1.13$	$0$	$0$	$0$	$0$

Results for commit ceeba70

♻️ This comment has been updated with latest results.