update image alt text syntax

Author: anita-flegg

Diff for: tile-reference/property-blueprints/_smtp-authentication.html.erb

@@ -70,6 +70,6 @@ job_types:
           text: Hello. The SMTP auth type is (( .properties.example_smtp_authentication.value ))
 ```
 
-![alt-text="Example Product with SMTP Authentication"](img/example-smtp-authentication-tile.png)
+![Example Product with SMTP Authentication](img/example-smtp-authentication-tile.png)
 
 <br><hr>

Diff for: tile-reference/property-blueprints/_stemcell-selector.html.erb

@@ -114,7 +114,7 @@ job_types:
             Selected stemcell OS: (( .properties.example_stemcell_selector.value ))
 ```
 
-![alt-text="Example Stemcell Selector"](img/example-stemcell-selector-tile.png)
+![Example Stemcell Selector](img/example-stemcell-selector-tile.png)
 
 
 <br><hr>

Diff for: tile-reference/property-blueprints/_string-list.html.erb

@@ -82,8 +82,8 @@ job_types:
 ```
 
 
-![alt-text="Example Product with String List"](img/example-string-list-tile.png)
+![Example Product with String List](img/example-string-list-tile.png)
 
-![alt-text="Example Product with SMTP Authentication"](img/example-smtp-authentication-tile.png)
+![Example Product with SMTP Authentication](img/example-smtp-authentication-tile.png)
 
 <br><hr>

Diff for: tile-reference/property-blueprints/_string.html.erb

@@ -89,7 +89,7 @@ job_types:
           text: Hello, (( .properties.example_string.value ))! Welcome.
 ```
 
-![alt-text="Example Product with String Information"](img/example-string-tile.png)
+![Example Product with String Information](img/example-string-tile.png)
 
 
 <br><hr>

Diff for: tile-reference/property-blueprints/_text.html.erb

@@ -74,5 +74,5 @@ job_types:
             (( .properties.example_text.value ))
 ```
 
-![alt-text="Example Product with Text"](img/example-text-tile.png)
+![Example Product with Text](img/example-text-tile.png)
 <br><hr>

Diff for: tile-reference/property-blueprints/_vm-type-dropdown.html.erb

@@ -84,6 +84,6 @@ job_types:
             text: Hello. Your chosen VM Type is (( .properties.example_vm_type_dropdown.value )).
 ```
 
-![alt-text="Example Product with VM Types Dropdown"](img/example-vm-type-dropdown-tile.png)
+![Example Product with VM Types Dropdown](img/example-vm-type-dropdown-tile.png)
 
 <br><hr>

Diff for: tile-reference/property-blueprints/_wildcard-domain.html.erb

@@ -76,6 +76,6 @@ job_types:
           text: Hello. Your wildcard domain is (( .properties.example_wildcard_domain.value )).
 ```
 
-![alt-text="Example Product with Wildcard Domain"](img/example-wildcard-domain-tile.png)
+![Example Product with Wildcard Domain](img/example-wildcard-domain-tile.png)
 
 <br><hr>