Corrected paths to Azure and Github examples

Updated Azure execute example to not throw errors because of quotes
Updated Azure setup example to use a more recent version

docs/examples/azure/gitversion/execute.md

@@ -1,10 +1,10 @@
 # Example
 
 ```yaml
-  steps:
-  - task: gitversion/execute@0
-    displayName: Use GitVersion
-  - script: |
-      echo "FullSemVer: $(fullSemVer)"
-      echo "##vso[build.updatebuildnumber]$(fullSemVer)"
+steps:
+- task: gitversion/execute@0
+  displayName: Use GitVersion
+- script: |
+    echo FullSemVer: $(fullSemVer)
+    echo ##vso[build.updatebuildnumber]$(fullSemVer)
 ```

docs/examples/azure/gitversion/setup.md

@@ -5,5 +5,5 @@
   - task: gitversion/setup@0
     displayName: Install GitVersion
     inputs:
-    versionSpec: '5.1.2'
+    versionSpec: '5.1.3'
 ```