[docs-infra] Adjust the links to search for issues

.github/ISSUE_TEMPLATE/1.bug.yml

@@ -9,7 +9,7 @@ body:
     attributes:
       label: Search keywords
       description: |
-        Your issue may have already been reported! First search for duplicates among the [existing issues](https://github.com/mui/mui-x/issues).
+        Your issue may have already been reported! First search for duplicates among the [existing issues](https://github.com/mui/mui-x/issues?q=is%3Aissue).
         If your issue isn't a duplicate, great! Please list the keywords you used so people in the future can find this one more easily:
     validations:
       required: true

.github/ISSUE_TEMPLATE/2.feature.yml

@@ -9,7 +9,7 @@ body:
     attributes:
       label: Search keywords
       description: |
-        Your issue may have already been reported! First search for duplicates among the [existing issues](https://github.com/mui/mui-x/issues).
+        Your issue may have already been reported! First search for duplicates among the [existing issues](https://github.com/mui/mui-x/issues?q=is%3Aissue).
         If your issue isn't a duplicate, great! Please list the keywords you used so people in the future can find this one more easily:
     validations:
       required: true

.github/ISSUE_TEMPLATE/3.pro-support.yml

@@ -21,7 +21,7 @@ body:
     attributes:
       label: Search keywords
       description: |
-        Your issue may have already been reported! First search for duplicates among the [existing issues](https://github.com/mui/mui-x/issues).
+        Your issue may have already been reported! First search for duplicates among the [existing issues](https://github.com/mui/mui-x/issues?q=is%3Aissue).
         If your issue isn't a duplicate, great! Please list the keywords you used so people in the future can find this one more easily:
     validations:
       required: true

.github/ISSUE_TEMPLATE/4.premium-support.yml

@@ -21,7 +21,7 @@ body:
     attributes:
       label: Search keywords
       description: |
-        Your issue may have already been reported! First search for duplicates among the [existing issues](https://github.com/mui/mui-x/issues).
+        Your issue may have already been reported! First search for duplicates among the [existing issues](https://github.com/mui/mui-x/issues?q=is%3Aissue).
         If your issue isn't a duplicate, great! Please list the keywords you used so people in the future can find this one more easily:
     validations:
       required: true

.github/ISSUE_TEMPLATE/5.priority-support.yml

@@ -11,7 +11,7 @@ body:
     attributes:
       label: Search keywords
       description: |
-        Your issue may have already been reported! First search for duplicates among the [existing issues](https://github.com/mui/mui-x/issues).
+        Your issue may have already been reported! First search for duplicates among the [existing issues](https://github.com/mui/mui-x/issues?q=is%3Aissue).
         If your issue isn't a duplicate, great! Please list the keywords you used so people in the future can find this one more easily:
     validations:
       required: true

.github/ISSUE_TEMPLATE/6.docs-feedback.yml

@@ -10,7 +10,7 @@ body:
     attributes:
       label: Search keywords
       description: |
-        Your issue may have already been reported! First search for duplicates among the [existing issues](https://github.com/mui/mui-x/issues).
+        Your issue may have already been reported! First search for duplicates among the [existing issues](https://github.com/mui/mui-x/issues?q=is%3Aissue).
         If your issue isn't a duplicate, great! Please list the keywords you used so people in the future can find this one more easily:
     validations:
       required: true

docs/data/introduction/support/support.md

@@ -8,7 +8,7 @@ We use GitHub issues as a bug and feature request tracker.
 
 If you think you've found a bug, or you have a new feature idea:
 
-1. Please start by [making sure it hasn't already been reported or fixed](https://github.com/mui/mui-x/issues?utf8=%E2%9C%93&q=is%3Aopen+is%3Aclosed).
+1. Please start by [making sure it hasn't already been reported or fixed](https://github.com/mui/mui-x/issues?q=is%3Aissue).
    You can search through existing issues and pull requests to see if someone has reported one similar to yours.
 2. Then, if no duplicates exist, [open an issue](https://github.com/mui/mui-x/issues/new/choose) in the MUI X repository.