remove unnecessary backticks [skip ci]

Author: wheeheee

.github/ISSUE_TEMPLATE/bug_report.md

@@ -23,23 +23,19 @@ A clear and concise description of what you expected to happen.
 
 ## Minimal reproducer
 If possible, please share the code for a MWE here so we can reproduce the bug.
-````
 ```julia
 function foo end
 [...]
 ```
-````
 
 ## Platform information
 Copy and paste the output of `versioninfo()` into a code block like this
-````
 ```julia-repl
 julia> versioninfo()
 Julia Version 1.12.4
 Commit 01a2eadb04 (2026-01-06 16:56 UTC)
 [...]
 ```
-````
 
 ## Additional context
 Add any other context about the problem here.