misc: Remove escape characters from bug_report.md

The bug_report.md is rendered as plain text, not markdown, when creating
a bug report. As such the escape characters are removed in this commit.

Change-Id: I524c66ae61d00b7ed59153ba9f4b2297ff50ee18

.github/ISSUE_TEMPLATE/bug_report.md

@@ -21,10 +21,10 @@ Steps to reproduce the behavior. Please assume starting from a clean repository:
 1. Compile gem5 with command ...
 2. Execute the simulation with...
 
-If writing code, or a terminal command, use code blocks. Either an inline code block, \`scons build/ALL/gem5.opt\` (enclosed in two \`) or a multi-line codeblock:
+If writing code, or a terminal command, use code blocks. Either an inline code block, `scons build/ALL/gem5.opt` (enclosed in two '`') or a multi-line codeblock:
 
 
-\`\`\`
+```
 
 int x=2;
 
@@ -32,7 +32,7 @@ int y=3'
 
 print(x+y);
 
-\`\`\`
+```
 
 If possible, please include the Python configuration script used and state clearly any parameters passed.
 
@@ -40,11 +40,11 @@ If possible, please include the Python configuration script used and state clear
 If applicable, add the terminal output here. If long, only include the relevant lines.
 Please put the terminal output in code blocks. I.e.:
 
-\`\`\`
+```
 
 #Terminal output here#
 
-\`\`\`
+```
 
 **Expected behavior**
 A clear and concise description of what you expected to happen.