Update issue templates (#28)

.github/ISSUE_TEMPLATE/bug_report.yml

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+name: Bug Report
+description: File a bug report
+labels: ["Type: Bug", "Status: Triage"]
+body:
+  - type: markdown
+    attributes:
+      value: >
+        Thanks for taking the time to fill out this bug report! Before submitting your issue, please make
+        sure you are using the latest version of the charm. If not, please try upgrading to the latest edge release prior to 
+        posting your report to make sure it's not already solved.
+  - type: textarea
+    id: bug-description
+    attributes:
+      label: Bug Description
+      description: >
+         If applicable, add screenshots to 
+        help explain the problem you are facing.      
+    validations:
+      required: true
+  - type: textarea
+    id: reproduction
+    attributes:
+      label: To Reproduce
+      description: >
+        Please provide the output of `juju export-bundle` and step-by-step instructions for how to reproduce the behavior.
+        A deployment diagram could be handy too. See https://discourse.charmhub.io/t/9269 for examples.
+      placeholder: |
+        1. `juju deploy ...`
+        2. `juju relate ...`
+        3. `juju status --relations`
+    validations:
+      required: true
+  - type: textarea
+    id: environment
+    attributes:
+      label: Environment
+      description: >
+        We need to know a bit more about the context in which you run the charm.
+        - Are you running Juju locally, on lxd, in multipass or on some other platform?
+        - What track and channel you deployed the charm from (ie. `latest/edge` or similar).
+        - Version of any applicable components, like the juju snap, the model controller, lxd, microk8s, and/or multipass.
+    validations:
+      required: true
+  - type: textarea
+    id: logs
+    attributes:
+      label: Relevant log output
+      description: >
+        Please copy and paste any relevant log output. This will be automatically formatted into code, so no need for backticks.
+        Fetch the logs using `juju debug-log --replay` and `kubectl logs ...`. Additional details available in the juju docs 
+        at https://juju.is/docs/olm/juju-logs
+      render: shell
+    validations:
+      required: true
+  - type: textarea
+    id: additional-context
+    attributes:
+      label: Additional context

.github/pull_request_template.md

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+## Issue
+<!-- What issue is this PR trying to solve? -->
+
+
+## Solution
+<!-- A summary of the solution addressing the above issue -->
+
+
+## Context
+<!-- What is some specialized knowledge relevant to this project/technology -->
+
+
+## Testing Instructions
+<!-- What steps need to be taken to test this PR? -->
+
+
+## Upgrade Notes
+<!-- To upgrade from an older revision of charmed prometheus, ... -->