Update .github

Author: khoih-prog

.github/ISSUE_TEMPLATE/bug_report.md

@@ -33,10 +33,20 @@ If applicable, add screenshots to help explain your problem.
 
 ### Information
 
+Please report bugs in [AsyncWebServer_RP2040W Issues](https://github.com/khoih-prog/AsyncWebServer_RP2040W/issues) if you find them.
+
+However, before reporting a bug please check through the following:
+
+* [Existing Open Issues](https://github.com/khoih-prog/AsyncWebServer_RP2040W/issues) - someone might have already encountered this.
+
+If you don't find anything, please [open a new issue](https://github.com/khoih-prog/AsyncWebServer_RP2040W/issues/new).
+
+### How to submit a bug report
+
 Please ensure to specify the following:
 
 * Arduino IDE version (e.g. 1.8.19) or Platform.io version
-* `RP2040` Core Version (e.g. RP2040 core v2.5.4)
+* `RP2040` Core Version (e.g. RP2040 core v2.6.0)
 * `RP2040W` Board type (e.g. RASPBERRY_PI_PICO_W)
 * Contextual information (e.g. what you were trying to achieve)
 * Simplest possible steps to reproduce
@@ -49,7 +59,7 @@ Please ensure to specify the following:
 
 ```
 Arduino IDE version: 1.8.19
-RP2040 core v2.5.4
+RP2040 core v2.6.0
 RASPBERRY_PI_PICO_W Module
 OS: Ubuntu 20.04 LTS
 Linux xy-Inspiron-3593 5.15.0-48-generic #54~20.04.1-Ubuntu SMP Thu Sep 1 16:17:26 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux