BSD sed/awk moving portion of line to line above (switching attribute in HTML file)

My situation is simple : I have an **HTML file with several lines** containing only the indented **` block tag**, each line **followed by** an (also indented)

...

` **title tag**. Like so :

fr 2024 en

**When using the anchored link** to go to a specific year within the page (or its translation), **the year title goes to hide** behind the ``. The **problem would be solved** by switching the id attribute one line up from the

to the `` tag, like so :

fr 2024 en

Is there a simple one-liner or command that would permit me **to switch all these id attributes from the

tag to the ` tag one line further up ?** I have not found how to match multiple lines in BSD sed or especially awk`.

's:\(\s*\)

does not change the file. Neither does \n\t\t in place of \s, or using double backslashes escapes. Is there an option to match for space characters like I assume GNU sed would ? **Only perhaps the insertion/use of newlines/tabs directly in the command**, but I would like to learn better and am also forced since I am working remotely and have to use termux on Android ... Also I am not skilled enough to use an awk workaround.