Issue templates: simplify library contribution note

Author: SableRaf

.github/ISSUE_TEMPLATE/2_enhancement.yml

@@ -7,7 +7,7 @@ body:
   attributes:
     value: |
       > [!NOTE]
-      > If you have an idea for something Processing doesn’t yet support, **creating a library** is often the best way to contribute.  The [Processing Library Template](https://github.com/processing/processing-library-template) provides a starting point for developing, packaging, and distributing Processing libraries. For more instructions, see the [library template documentation](https://processing.github.io/processing-library-template/). Read more about creating a library [here](https://github.com/processing/processing4/blob/main/CONTRIBUTING.md#adding-new-features-to-processing).
+      > If you have an idea for something Processing doesn’t yet support, **creating a library** is often the best way to contribute. Read more about creating a library [here](https://github.com/processing/processing4/blob/main/CONTRIBUTING.md#adding-new-features-to-processing).
 
 - type: dropdown
   id: feature-area

.github/ISSUE_TEMPLATE/3_feature-request.yml

@@ -7,7 +7,7 @@ body:
   attributes:
     value: |
       > [!NOTE]
-      > If you have an idea for something Processing doesn’t yet support, **creating a library** is often the best way to contribute.  The [Processing Library Template](https://github.com/processing/processing-library-template) provides a starting point for developing, packaging, and distributing Processing libraries. For more instructions, see the [library template documentation](https://processing.github.io/processing-library-template/). Read more about creating a library [here](https://github.com/processing/processing4/blob/main/CONTRIBUTING.md#adding-new-features-to-processing).
+      > If you have an idea for something Processing doesn’t yet support, **creating a library** is often the best way to contribute. Read more about creating a library [here](https://github.com/processing/processing4/blob/main/CONTRIBUTING.md#adding-new-features-to-processing).
 
 - type: dropdown
   id: feature-area