Fix broken YML links and add PR template (#1340)

* Fix MD files with broken links

- fixing all broken links
- all YML files are now in capital case

* Add PR template

* remove comments

.github/workflows/compile_mermaid.yml

@@ -1,4 +1,4 @@
-name: 'Compile Mermaid in Markdown'
+name: 'Compile Mermaid to MD'
 
 on:
   push:

.github/workflows/deploy_be_staging.yml

@@ -1,4 +1,4 @@
-name: Deploy Backend staging
+name: Deploy Backend Staging
 on:
   pull_request:
     branches: [main]

.github/workflows/deploy_fe_staging.yml

@@ -1,4 +1,4 @@
-name: Deploy Frontend staging
+name: Deploy Frontend Staging
 on:
   pull_request:
     branches: [main]

.github/workflows/e2e.yml

@@ -1,7 +1,7 @@
 # Full command list of cypress github actions:
 #   https://github.com/cypress-io/github-action#cypress-iogithub-action--
 
-name: End to end tests
+name: End to End Tests
 on:
   # To run tests on the push event of a specific branch:
   # push: