Merge pull request #8628 from dotty-staging/template-output

issue template: more general header

Author: anatoliykmetyuk

.github/ISSUE_TEMPLATE/bug.md

@@ -7,16 +7,16 @@ assignees: ''
 
 ---
 
-## minimized code
+## Minimized code
 
 ```Scala
 println("hello, world")
 ```
 
-## Compilation output
+## Output
 
 ```scala
-// TODO add compilation output here
+// TODO add output here
 ```
 
-## expectation
+## Expectation

.github/ISSUE_TEMPLATE/crash.md

@@ -7,13 +7,13 @@ assignees: ''
 
 ---
 
-## minimized code
+## Minimized code
 
 ```Scala
 println("hello, world")
 ```
 
-## Crash output (click arrow to expand)
+## Output (click arrow to expand)
 <details>
 
 ```scala

.github/ISSUE_TEMPLATE/other-issue.md

@@ -7,16 +7,16 @@ assignees: ''
 
 ---
 
-## minimized example
+## Minimized example
 
 ```Scala
 println("hello, world")
 ```
 
-## Compilation output
+## Output
 
 ```scala
-// TODO add compilation output here
+// TODO add output here
 ```
 
-## expectation
+## Expectation