docs: typo

Author: fspoettel

README.md

@@ -190,7 +190,7 @@ Do you have aoc-specific crate recommendations? [Share them!](https://github.com
 
 ## Footnotes
 
-[^1]:The session cookie might expire after a while (~1 month) which causes the downloads to fail. To fix this issue, refresh the `.adventofcode.session` file.
+[^1]: The session cookie might expire after a while (~1 month) which causes the downloads to fail. To fix this issue, refresh the `.adventofcode.session` file.
 [^2]: The session cookie might expire after a while (~1 month) which causes the automated workflow to fail. To fix this issue, refresh the AOC_SESSION secret.
 [^3]: <img src="https://user-images.githubusercontent.com/1682504/198838369-453dc22c-c645-4803-afe0-fc50d5a3f00c.png" alt="Set a breakpoint" width="450" /> 
 [^4]: <img alt="Run debugger" src="https://user-images.githubusercontent.com/1682504/198838372-c89369f6-0d05-462e-a4c7-8cd97b0912e6.png" width="450" />