fix: typo in cli help (#196)

threead -> thread

Co-authored-by: Jeremy Fehr <[email protected]>

Author: simi

lib/functions_framework/cli.rb

@@ -98,10 +98,10 @@ def parse_args argv # rubocop:disable Metrics/MethodLength,Metrics/AbcSize
         op.on "-e", "--environment ENV", "Set the Rack environment" do |val|
           @env = val
         end
-        op.on "--min-threads NUM", "Set the minimum threead pool size" do |val|
+        op.on "--min-threads NUM", "Set the minimum thread pool size" do |val|
           @min_threads = val
         end
-        op.on "--max-threads NUM", "Set the maximum threead pool size" do |val|
+        op.on "--max-threads NUM", "Set the maximum thread pool size" do |val|
           @max_threads = val
         end
         op.on "--[no-]detailed-errors", "Set whether to show error details" do |val|