Update issue template for change to source/report button locations (#6040)

Resolves #6035

Author: parlough

.github/ISSUE_TEMPLATE/1_page_issue.yml

@@ -1,25 +1,25 @@
 name: Page issue
-description: Help improve the content or quality of a dart.dev page
+description: Help improve the content or quality of a dart.dev page.
 labels: [from.page-issue]
 body:
   - type: markdown
     attributes:
       value: |
           Found a typo? You can fix it yourself!
 
-          1. Click the page icon to the left of the bug icon you clicked to come to this form. The GitHub page source should display.
-          1. Click the pencil icon displayed above the source code.
+          1. Scroll to the bottom of the page with the typo.
+          1. Use the "View source" link located after the content to navigate to the page's source on GitHub.
           1. Fix the typo.
           1. Click **Commit changes...**.
-          1. Update the commit message and add a description.
+          1. Update the title, add a commit message, and add a description.
           1. Click **Propose changes**.
 
           If you want another contributor to fix this issue, complete this form.
   - type: input
     id: page-url
     attributes:
       label: Page URL
-      placeholder: "Add the address of this page. An example would be https://dart.dev/guides"
+      placeholder: "Add the address of this page. An example would be https://dart.dev/language"
     validations:
       required: true
   - type: input

.github/ISSUE_TEMPLATE/4_infrastructure.yml

@@ -1,6 +1,6 @@
 name: Site infrastructure issue
 description: |
-    Report a problem with the build, repo, or tooling for dart.dev
+    Report a problem with the build, repo, or tooling for dart.dev.
 labels: [infra.structure, from.user]
 body:
   - type: textarea

.github/PULL_REQUEST_TEMPLATE.md

@@ -15,5 +15,5 @@ Fixes <Replace with issue link>
   - See our [contributor guide](https://github.com/dart-lang/site-www/blob/main/CONTRIBUTING.md) for general expectations for PRs.
   - Larger or significant changes should be discussed in an issue before creating a PR.
   - Code changes should generally follow the [Dart style guide](https://dart.dev/effective-dart) and use `dart format`.
-  - Updates to [code excerpts](https://github.com/dart-lang/site-shared/blob/main/doc/code-excerpts.md) indicated by `<?code-excerpt` need to be updated in their source `.dart` file as well.
+  - Updates to [code excerpts](https://github.com/dart-lang/site-shared/blob/main/packages/excerpter) indicated by `<?code-excerpt` need to be updated in their source `.dart` file as well.
 </details>