Adding changes for configuring unsafe ssl for self signed certs use c…

…ase for Prometheus scalar (#913)

Co-authored-by: Jorge Turrado Ferrero <[email protected]>

content/docs/2.9/scalers/prometheus.md

@@ -24,6 +24,7 @@ triggers:
     namespace: example-namespace  # for namespaced queries, eg. Thanos
     cortexOrgId: my-org # Optional. X-Scope-OrgID header for Cortex.
     ignoreNullValues: false # Default is `true`, which means ignoring the empty value list from Prometheus. Set to `false` the scaler will return error when Prometheus target is lost
+    unsafeSsl: false #  Default is `false`, Used for skipping certificate check when having self signed certs for Prometheus endpoint
 ```
 
 **Parameter list:**
@@ -36,6 +37,7 @@ triggers:
 - `namespace` - A namespace that should be used for namespaced queries. These are required by some highly available Prometheus setups, such as [Thanos](https://thanos.io). (Optional)
 - `cortexOrgId` - The `X-Scope-OrgID` header to query multi tenant [Cortex](https://cortexmetrics.io/). (Optional)
 - `ignoreNullValues` - Value to reporting error when Prometheus target is lost (Values: `true`,`false`, Default: `true`, Optional)
+- `unsafeSsl` - Used for skipping certificate check e.g: using self signed certs  (Values: `true`,`false`, Default: `false`, Optional)
 
 ### Authentication Parameters