Minor fixes to eth methods (#582)

* Minor fixes to `eth` methods

* revert oneOf

Author: alexandratran

src/eth/block.yaml

@@ -80,7 +80,7 @@
     - name: eth_getBlockByNumber example
       params:
         - name: block
-          value: '0x68B3'
+          value: '0x68b3'
         - name: Hydrated transactions
           value: false
       result:

src/eth/state.yaml

@@ -133,8 +133,8 @@
           value: '0xe5cB067E90D5Cd1F8052B83562Ae670bA4A211a8'
         - name: StorageKeys
           value:
-            - '0x56e81f'
-            - '0x283s34'
+            - '0x56e81f171bcc55a6ff8345e692c0f86e5b48e01b996cadc001622fb5e363b421'
+            - '0x283s34c8e2b1456f09832c71e5d6a0b4f8c9e1d3a2b5c7f0e6d4a8b2c1f3e5d7'
         - name: Block
           value: 'latest'
       result: