updates readme and adds sample data

Data/CertificateFeatures-sample.parquet

@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:8a98afde36b3a5187cfb7d032783f478f8157b2c2d9c59b869f29538d0f909e8
+size 90600349

README.md

@@ -11,6 +11,9 @@ tags:
 size_categories:
 - 10M<n<100M
 pretty_name: Machine Identity Spectra Dataset
+configs:
+  - config_name: sample_data
+    data_files: Data/CertificateFeatures-data.parquet
 ---
 
 # Venafi Machine Identity Spectra Dataset
@@ -22,7 +25,7 @@ This collection of data contains extracted features from 19m+ certificates disco
 public internet between July 20 and July 26, 2023.
 The features are a combination of X.509 certificate features, RFC5280 compliance checks, 
 and other attributes intended to be used for clustering, features analysis, and a base for supervised learning tasks (labels not included).
-Some rows may contain nan values as well and as such could require some additional pre-processing for certain tasks.
+Some rows may contain nan values as well and as such could require additional pre-processing for certain tasks.
 
 Venafi is excited to engage with the data science community to increase the adoption of machine learning techniques 
 in the machine identity management and wider security domains.
@@ -32,6 +35,9 @@ The extracted features are contained in the Data folder as certificateFeatures.c
 approximately 10GB and contains 98 extracted features for approximately 19m certificates. A description of the features
 and expected data types is contained in the base folder as features.csv.
 
+The Data folder also contains a 500k row sample of the data in parquet format. This is  displayed in the Data Viewer 
+for easy visual inspection of the dataset.
+
 ## Clustering and PCA Example
 
 To demonstrate a potential use of the data, clustering and Principal Component Analysis (PCA) were