Update GitHub issue templates

.github/ISSUE_TEMPLATE/bug.md

+---
+name: Bug
+about: Report a bug related to kube-prometheus
+labels: kind/bug
+---
+
+<!--
+
+Feel free to ask questions in #prometheus-operator on Kubernetes Slack!
+
+-->
+
+**What happened?**
+
+**Did you expect to see some different?**
+
+**How to reproduce it (as minimally and precisely as possible)**:
+
+**Environment**
+
+* Prometheus Operator version:
+
+    `Insert image tag or Git SHA here`
+    <!-- Try kubectl -n monitoring describe deployment prometheus-operator -->
+
+* Kubernetes version information:
+
+    `kubectl version`
+    <!-- Replace the command with its output above -->
+
+* Kubernetes cluster kind:
+
+    insert how you created your cluster: kops, bootkube, tectonic-installer, etc.
+
+* Manifests:
+
+```
+insert manifests relevant to the issue
+```
+
+* Prometheus Operator Logs:
+
+```
+Insert Prometheus Operator logs relevant to the issue here
+```
+
+* Prometheus Logs:
+
+```
+Insert Prometheus logs relevant to the issue here
+```
+
+**Anything else we need to know?**:

.github/ISSUE_TEMPLATE/feature.md

+---
+name: Feature
+about: If you want to propose a new feature or enhancement
+labels: kind/feature
+---
+
+<!--
+
+Feel free to ask questions in #prometheus-operator on Kubernetes Slack!
+
+-->
+
+**What is missing?**
+
+**Why do we need it?**
+
+**Environment**
+
+* kube-prometheus version:
+
+    `Insert Git SHA here`
+
+**Anything else we need to know?**:

.github/ISSUE_TEMPLATE/support.md

+---
+name: Support
+about: If you have questions about kube-prometheus
+labels: kind/support
+---
+
+<!--
+
+Feel free to ask questions in #prometheus-operator on Kubernetes Slack!
+
+-->
+
+**What did you do?**
+
+**Did you expect to see some different?**
+
+**Environment**
+
+* Prometheus Operator version:
+
+    `Insert image tag or Git SHA here`
+    <!-- Try kubectl -n monitoring describe deployment prometheus-operator -->
+
+* Kubernetes version information:
+
+    `kubectl version`
+    <!-- Replace the command with its output above -->
+
+* Kubernetes cluster kind:
+
+    insert how you created your cluster: kops, bootkube, tectonic-installer, etc.
+
+* Manifests:
+
+```
+insert manifests relevant to the issue
+```
+
+* Prometheus Operator Logs:
+
+```
+Insert Prometheus Operator logs relevant to the issue here
+```
+
+* Prometheus Logs:
+
+```
+Insert Prometheus logs relevant to the issue here
+```
+
+**Anything else we need to know?**: