Fixes markdownlint error for bare url

this fixes following lint error
./docs/content/docs/guide/resolver.md:103:36 MD034/no-bare-urls Bare URL used [Context: "http://"]
./docs/content/docs/guide/resolver.md:103:47 MD034/no-bare-urls Bare URL used [Context: "https://"]

Signed-off-by: Shivam Mukhade <[email protected]>

Author: Shivam Mukhade

docs/content/docs/guide/resolver.md

@@ -100,7 +100,7 @@ pipelinesascode.tekton.dev/task: "[git-clone:0.1]" # this will install git-clone
 
 ### Remote HTTP URL
 
-If you have a string starting with http:// or https://, `Pipelines as Code`
+If you have a string starting with `http://` or `https://`, `Pipelines as Code`
 will fetch the task directly from that remote URL :
 
 ```yaml