adding masking_strategy: to config

Author: shmh40

config/default_config.yml

@@ -78,7 +78,7 @@ masking_rate_sampling: True
 # sample a subset of all target points, useful e.g. to reduce memory requirements
 sampling_rate_target: 1.0
 # include a masking strategy here, currently only supporting "random" and "block"
-masking_strategy: "block"
+masking_strategy: "random"
 
 num_epochs: 24
 samples_per_epoch: 4096