Fix grammar (#1158)

Author: geek1011

.github/issue_template.md

@@ -1,7 +1,7 @@
-1. Please speak English, this is the language everybody of us can speak and write.
-2. Please ask questions or config/deploy problems on our Gitter channel: https://gitter.im/go-gitea/gitea
-3. Please take a moment to search that an issue doesn't already exist.
-4. Please give all relevant information below for bug reports, incomplete details will be handled as an invalid report.
+1. Please speak English, this is the language all of us can speak and write.
+2. Please ask questions or configuration/deploy problems on our Gitter channel: https://gitter.im/go-gitea/gitea
+3. Please take a moment to search check that your issue doesn't already exist.
+4. Please give all relevant information below for bug reports, because incomplete details will be handled as an invalid report.
 
 **You MUST delete the content above including this line before posting, otherwise your issue will be invalid.**
 
@@ -25,4 +25,4 @@
 
 ## Screenshots
 
-**If regarding the Web Interface, please include a screenshot**
+**If this issue involves the Web Interface, please include a screenshot**