admin: Correct spelling in build_problem.md template (#4945)

Small typo in our `build_problem.md` github template.

Signed-off-by: Jesse Yurkovich <[email protected]>

Author: jessey-git

.github/ISSUE_TEMPLATE/build_problem.md

@@ -7,7 +7,7 @@ assignees: ''
 
 ---
 
-**PLEASE DO NOT REPORT BUILD TROUBLES AS GITHUB "ISSUES" UNLESS YOU ARE RALLY SURE IT'S A BUG**
+**PLEASE DO NOT REPORT BUILD TROUBLES AS GITHUB "ISSUES" UNLESS YOU ARE REALLY SURE IT'S A BUG**
 
 The best way to get help with your build problems is to ask a question on the
 [oiio-dev developer mail list](https://lists.aswf.io/g/oiio-dev).