[add] Included Benchmark Specification Request GH template (#59)

Author: filipecosta90

.github/ISSUE_TEMPLATE/benchmark-spec-request.md

@@ -0,0 +1,51 @@
+name: Benchmark Specification Request
+
+description: File a benchmark SPEC request for improvement or addition
+
+title: "[SPEC]: "
+
+labels: ["spec", "triage"]
+
+assignees:
+  - filipecosta90
+
+body:
+  - type: markdown
+    attributes:
+      value: |
+        Thanks for taking the time to fill out this benchmark specification request for improvement or addition!
+        Here's our manifesto:
+    
+        - The Redis benchmarks specification describes the cross-language/tools requirements and expectations to foster 
+        performance and observability OPEN standards around Redis related technologies.
+
+        - Members from both industry and academia, including organizations and individuals are encouraged to contribute. 
+        
+        - This Project is Provider/Company/Org independent and fosters true openness about Performance, meaning the SOLE
+        purpose of it is to improve/retain Redis Performance.
+    
+        Make sure to double check if this this benchmark specification request for improvement or addition hasn't 
+        already been asked for at the [issues section](https://github.com/redis/redis-benchmarks-specification/labels/spec).
+        
+
+  - type: dropdown
+    id: type
+    attributes:
+      label: Improvement/Addition type
+      description: What changes to the current SPEC does this issue focuses upon?
+      options:
+        - Add a benchmark variant
+        - Improve a benchmark variant
+        - Raise awareness for a new Redis benchmark tool
+        - Suggest a different Redis Build Variant
+        - Other (fill details in section bellow)
+    
+  - type: textarea
+    id: details
+    attributes:
+      label: Detail the requested changes
+      description: Include reference to the benchmarks/tools you've seen and want to see part of the spec.
+      placeholder: Include reference to the benchmarks/tools you've seen and want to see part of the spec.
+    validations:
+      required: true
+