Update sanitize_options option deprecation notice

Give a specific version when we remove the sanitize_options
configuration option.

x-pack/filebeat/input/azureeventhub/README.md

@@ -16,6 +16,7 @@ Users can use the `sanitizers` configuration option to set up the input sanitiza
 input detects invalid JSON, the input will try to fix or remove it from the log.
 
 Existing sanitizers:
+
 - `new_lines`: removes new lines inside JSON strings.
 - `single_quotes`: replaces single quotes with double quotes in JSON strings.
 - `replace_all`: replaces all occurrences of a substring matching a regex pattern with a fixed literal string.
@@ -68,7 +69,6 @@ GitHub issue:
 
 - https://github.com/elastic/beats/issues/34092
 
-
 #### double_quotes
 
 Here is an example of the `sanitizers` configuration option with the `double_quotes` sanitizer:
@@ -115,8 +115,6 @@ the following GitHub issue:
 
 - https://github.com/elastic/azuremarketplacedev/issues/190
 
-
-
 #### replace_all
 
 Here is an example of the `sanitizers` configuration option with the `replace_all` sanitizer:

x-pack/filebeat/input/azureeventhub/config.go

@@ -59,7 +59,7 @@ type azureInputConfig struct {
 	//       - type: single_quotes
 	//
 	// The `sanitize_options` option is deprecated and will be
-	// removed in future releases.
+	// removed in 9.0 release.
 	//
 	// Default is an empty list (no sanitization).
 	LegacySanitizeOptions []string `config:"sanitize_options"`
@@ -150,7 +150,7 @@ func (conf *azureInputConfig) Validate() error {
 
 	// log a warning for each sanitization option not supported
 	for _, opt := range conf.LegacySanitizeOptions {
-		logger.Warnw("legacy sanitization `sanitize_options` options are deprecated and will be removed in future releases; use the `sanitizers` option instead", "option", opt)
+		logger.Warnw("legacy sanitization `sanitize_options` options are deprecated and will be removed in the 9.0 release; use the `sanitizers` option instead", "option", opt)
 		err := sanitizeOptionsValidate(opt)
 		if err != nil {
 			logger.Warnf("%s: %v", opt, err)

x-pack/filebeat/input/azureeventhub/sanitizers_legacy.go

@@ -16,7 +16,8 @@ import "errors"
 // - NEW_LINES: replaces new lines with spaces
 // - SINGLE_QUOTES: replaces single quotes with double quotes
 //
-// The legacy `sanitize_options` is deprecated and will be removed in the future.
+// The legacy `sanitize_options` is deprecated and will be removed in the 
+// 9.0 release.
 // Users should use the `sanitizers` configuration option instead.
 //
 // However, the current sanitization implementation honors the legacy sanitization