issue templates: simplify contribution guide line

Author: SableRaf

.github/ISSUE_TEMPLATE/1_bug_report.yml

@@ -111,4 +111,4 @@ body:
   attributes:
     value: |
       > [!NOTE]
-      > Processing is a community-driven, open-source project. If you have time and interest to help, your contribution would be greatly appreciated! See the [contribution guide](https://github.com/processing/processing4/blob/main/CONTRIBUTING.md) to learn more about ways to get involved.
+      > Processing is a community-driven, open-source project. If you have time and interest to help, your contribution would be greatly appreciated! See the [contribution guide](https://github.com/processing/processing4/blob/main/CONTRIBUTING.md) to learn more.

.github/ISSUE_TEMPLATE/2_enhancement.yml

@@ -80,4 +80,4 @@ body:
   attributes:
     value: |
       > [!NOTE]
-      > Processing is a community-driven, open-source project. If you have time and interest to help, your contribution would be greatly appreciated! See the [contribution guide](https://github.com/processing/processing4/blob/main/CONTRIBUTING.md) to learn more about ways to get involved.
+      > Processing is a community-driven, open-source project. If you have time and interest to help, your contribution would be greatly appreciated! See the [contribution guide](https://github.com/processing/processing4/blob/main/CONTRIBUTING.md) to learn more.

.github/ISSUE_TEMPLATE/3_feature-request.yml

@@ -72,4 +72,4 @@ body:
   attributes:
     value: |
       > [!NOTE]
-      > Processing is a community-driven, open-source project. If you have time and interest to help, your contribution would be greatly appreciated! See the [contribution guide](https://github.com/processing/processing4/blob/main/CONTRIBUTING.md) to learn more about ways to get involved.
+      > Processing is a community-driven, open-source project. If you have time and interest to help, your contribution would be greatly appreciated! See the [contribution guide](https://github.com/processing/processing4/blob/main/CONTRIBUTING.md) to learn more.