docs: Fix typos in GitHub templates (serverless#567)

Author: dnicolson

.github/ISSUE_TEMPLATE/bug_report.md

@@ -5,8 +5,8 @@ about: Create a report to help us improve
 
 <!--
 1. Please check if an issue already exists. This bug may have already been documented
-2. Check out and follow our Guidelines: https://github.com/serverless/serverless-azure-functions/CONTRIBUTING.md
-3. Fill out the whole template so we have a good overview on the issue
+2. Check out and follow our Guidelines: https://github.com/serverless/serverless-azure-functions/blob/master/CONTRIBUTING.md
+3. Fill out the whole template so we have a good overview of the issue
 4. Do not remove any section of the template. If something is not applicable leave it empty but leave it in the Issue
 5. Please follow the template, otherwise we'll have to ask you to update it
 -->
@@ -18,7 +18,7 @@ about: Create a report to help us improve
 - What went wrong?
 - What did you expect should have happened?
 - What was the config you used?
-- What stacktrace or error message from your provider did you see?
+- What stack trace or error message from your provider did you see?
 
 Similar or dependent issues:
 

.github/ISSUE_TEMPLATE/feature_request.md

@@ -5,8 +5,8 @@ about: Suggest an idea for serverless-azure-functions
 
 <!--
 1. Please check if an issue already exists. This feature may have already been requested
-2. Check out and follow our Guidelines: https://github.com/serverless/serverless-azure-functions/CONTRIBUTING.md
-3. Fill out the whole template so we have a good overview on the issue
+2. Check out and follow our Guidelines: https://github.com/serverless/serverless-azure-functions/blob/master/CONTRIBUTING.md
+3. Fill out the whole template so we have a good overview of the issue
 4. Do not remove any section of the template. If something is not applicable leave it empty but leave it in the Issue
 5. Please follow the template, otherwise we'll have to ask you to update it
 -->

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,5 +1,5 @@
 <!--
-1. Please check out and follow our Contributing Guidelines: https://github.com/serverless/serverless-azure-functions/CONTRIBUTING.md
+1. Please check out and follow our Contributing Guidelines: https://github.com/serverless/serverless-azure-functions/blob/master/CONTRIBUTING.md
 2. Do not remove any section of the template. If something is not applicable leave it empty but leave it in the PR
 3. Please follow the template, otherwise we'll have to ask you to update it and it will take longer until your PR is merged
 -->
@@ -15,7 +15,7 @@ Briefly describe the feature if no issue exists for this PR
 ## How did you implement it:
 
 <!--
-If this is a nontrivial change please briefly describe your implementation so its easy for us to understand and review your code.
+If this is a nontrivial change please briefly describe your implementation so it's easy for us to understand and review your code.
 -->
 
 ## How can we verify it: