issue-bug.yml: Add a link to Supported Operating Systems page

.github/ISSUE_TEMPLATE/issue-bug.yml

@@ -11,13 +11,13 @@ body:
         Please use [our forum](https://groups.google.com/g/tesseract-ocr).
 
         Please follow these rules:
+        * Check that your Operating Systems is [supported](https://tesseract-ocr.github.io/tessdoc/supported-operating-systems.html).
         * Don't open an issue for [Tesseract version which was released more than a year ago](https://tesseract-ocr.github.io/tessdoc/ReleaseNotes.html).
         * Don't open an issue which involves 3rd party tools that use Tesseract as a library. Only report about an issue with the Tesseract command line tool or the C/C++ API.
         * Please provide the input image.
         * Also provide output files (txt and/or tsv, hocr, pdf). You can make a zip archive that will contain these files, so GitHub will let you upload them.
         * Don't attach a screenshot of the command line and output. Instead, copy the text and paste it in your bug report.
 
-        Windows versions 7, 8, 8.1 are not supported.
   - type: textarea
     attributes:
       label: Current Behavior