Update issue templates

.github/ISSUE_TEMPLATE/bug-report.md

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+---
+name: Bug report
+about: Create a report to help us improve
+title: ''
+labels: I think a bug here
+assignees: ''
+
+---
+
+If you want to report a bug - provide:
+    * description of a bug
+    * what command do you use?
+    * do you use Win/Linux/Mac?
+    * attach screenshot of a bug with previous messages in terminal
+    * in what cases a bug occurs, and in which not?
+    * if possible, specify date/commit of Darknet that works without this bug
+    * show such screenshot with info
+```
+./darknet detector test cfg/coco.data cfg/yolov4.cfg yolov4.weights data/dog.jpg
+ CUDA-version: 10000 (10000), cuDNN: 7.4.2, CUDNN_HALF=1, GPU count: 1
+ CUDNN_HALF=1
+ OpenCV version: 4.2.0
+ 0 : compute_capability = 750, cudnn_half = 1, GPU: GeForce RTX 2070
+net.optimized_memory = 0
+mini_batch = 1, batch = 8, time_steps = 1, train = 0
+   layer   filters  size/strd(dil)      input                output
+```