[chore][processor/probabilisticsampler] Document clarity regarding sampling_priority configuration (#36668)

Fixes #30410

Signed-off-by: Juraci Paixão Kröhling <[email protected]>

Signed-off-by: Juraci Paixão Kröhling <[email protected]>

Author: jpkrohling

processor/probabilisticsamplerprocessor/README.md

@@ -314,7 +314,7 @@ The following configuration options can be modified:
 
 - `attribute_source` (string, optional, default = "traceID"): defines where to look for the attribute in from_attribute. The allowed values are `traceID` or `record`.
 - `from_attribute` (string, optional, default = ""): The name of a log record attribute used for sampling purposes, such as a unique log record ID. The value of the attribute is only used if the trace ID is absent or if `attribute_source` is set to `record`.
-- `sampling_priority` (string, optional, default = ""): The name of a log record attribute used to set a different sampling priority from the `sampling_percentage` setting. 0 means to never sample the log record, and >= 100 means to always sample the log record.
+- `sampling_priority` (string, optional, default = ""): The name of a log record attribute used to set a different sampling priority from the `sampling_percentage` setting. The record attribute value's should be between 0 and 100, while 0 means to never sample the log record, and >= 100 means to always sample the log record.
 
 Examples: