Update issue templates

Updated the latest version for e.g. 
Put at the top of the template "Please fill out this template"

.github/ISSUE_TEMPLATE/Bug_report.md

@@ -4,12 +4,14 @@ about: Create a report to help us improve OpenShot
 
 ---
 
+**Please fill out this template** 
+
 **Describe the bug**
 A clear and concise description of what the bug is.
 
 **System Details (please complete the following information):**
  - Operating System / Distro: [e.g. Windows 10, Linux Mint 17.1]
- - OpenShot Version [e.g. 2.4.1]
+ - OpenShot Version [e.g. 2.4.3]
 
 **To Reproduce**
 Steps to reproduce the behavior:

.github/ISSUE_TEMPLATE/Feature_request.md

@@ -4,6 +4,8 @@ about: Suggest an idea for OpenShot
 
 ---
 
+**Please fill out this template** 
+
 **Is your feature request related to a problem? Please describe.**
 A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
 

.github/ISSUE_TEMPLATE/i-have-a-question.md

@@ -4,6 +4,8 @@ about: Ask a question about obtaining, installing, or using OpenShot
 
 ---
 
+**Please fill out this template** 
+
 <!--Give your question a descriptive title so that others will be able to understand at a glance how they can help. Then, explain in more detail under "My Question" below -->
 
 **My Question:**
@@ -15,7 +17,7 @@ about: Ask a question about obtaining, installing, or using OpenShot
 
 **System Details**
  - Operating System / Distro: [e.g. Windows 10, Linux Mint 17.1]
- - OpenShot Version [e.g. 2.4.1]
+ - OpenShot Version [e.g. 2.4.3]
 
 **Screenshots**
 <!-- If applicable, add screenshots to help illustrate your question. You can include screenshots by copy/pasting them here, dragging-and-dropping into this form, or clicking below and loading images saved to your computer. All images are public, so please don't post screenshots containing personal information. -->