fix: GitHub requires .yml extension (#6542)

* fix: GitHub requires `.yml` extension

Ref: https://docs.github.com/en/communities/using-templates-to-encourage-useful-issues-and-pull-requests/configuring-issue-templates-for-your-repository#configuring-the-template-chooser

* fix: remove newlines from multiline string

* fix: use textarea for dependencies list input

Author: dhruvmanila

Diff for: .github/ISSUE_TEMPLATE/bug_report.yaml renamed to .github/ISSUE_TEMPLATE/bug_report.yml

@@ -4,15 +4,15 @@ labels: [bug]
 body:
   - type: markdown
     attributes:
-      value: |
+      value: >
         Before requesting please search [existing issues](https://github.com/TheAlgorithms/Python/labels/bug).
         Usage questions such as "How do I...?"  belong on the
         [Discord](https://discord.gg/c7MnfGFGa6) and will be closed.
 
   - type: input
     attributes:
       label: "Repository commit"
-      description: |
+      description: >
         The commit hash for `TheAlgorithms/Python` repository. You can get this
         by running the command `git rev-parse HEAD` locally.
       placeholder: "a0b0f414ae134aa1772d33bb930e5a960f9979e8"
@@ -26,10 +26,10 @@ body:
     validations:
       required: true
 
-  - type: input
+  - type: textarea
     attributes:
       label: "Dependencies version (pip freeze)"
-      description: |
+      description: >
         This is the output of the command `pip freeze --all`. Note that the
         actual output might be different as compared to the placeholder text.
       placeholder: |

Diff for: .github/ISSUE_TEMPLATE/config.yaml renamed to .github/ISSUE_TEMPLATE/config.yml

@@ -4,15 +4,15 @@ labels: [enhancement]
 body:
   - type: markdown
     attributes:
-      value: |
+      value: >
         Before requesting please search [existing issues](https://github.com/TheAlgorithms/Python/labels/enhancement).
         Usage questions such as "How do I...?"  belong on the
         [Discord](https://discord.gg/c7MnfGFGa6) and will be closed.
 
   - type: textarea
     attributes:
       label: "Feature description"
-      description: |
+      description: >
         This could be new algorithms, data structures or improving any existing
         implementations.
     validations: