Fix examples (got out of sync). (bluesky#477)

README.md

@@ -122,19 +122,17 @@ index
 >>> client['long_table'].read(['A', 'B'])
               A         B
 index
-0      0.748885  0.769644
-1      0.071319  0.364743
-2      0.322665  0.897854
-3      0.328785  0.810159
-4      0.158253  0.822505
+0      0.246920  0.493840
+1      0.326005  0.652009
+2      0.715418  1.430837
+3      0.425147  0.850294
+4      0.781036  1.562073
 ...         ...       ...
-95     0.913758  0.488304
-96     0.969652  0.287850
-97     0.769774  0.941785
-98     0.350033  0.052412
-99     0.356245  0.683540
-
-[100 rows x 2 columns]
+99995  0.515248  1.030495
+99996  0.639188  1.278376
+99997  0.269851  0.539702
+99998  0.566848  1.133695
+99999  0.101446  0.202892
 ```
 
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