Fix typo in era blog post

Author: jpraynaud

docs/blog/2023-03-02-era-switch-feature/index.md

@@ -33,7 +33,7 @@ ERA_READER_ADAPTER_TYPE=cardano-chain
 ERA_READER_ADAPTER_PARAMS={"address":"addr_test1qpkyv2ws0deszm67t840sdnruqgr492n80g3y96xw3p2ksk6suj5musy6w8lsg3yjd09cnpgctc2qh386rtxphxt248qr0npnx","verification_key":"5b35352c3232382c3134342c38372c3133382c3133362c34382c382c31342c3138372c38352c3134382c39372c3233322c3235352c3232392c33382c3234342c3234372c3230342c3139382c31332c33312c3232322c32352c3136342c35322c3130322c39312c3132302c3230382c3134375d"}
 ```
 
-All theses information will be available at the updated [`Run a Mithril Signer node (SPO)`](https://mithril.network/doc/manual/getting-started/run-signer-node) guide.
+All these information will be available at the updated [`Run a Mithril Signer node (SPO)`](https://mithril.network/doc/manual/getting-started/run-signer-node) guide.
 
 Here is a schema that illustrates the era switch behavior:
 [![Era Switch Schema](./img/schema.jpg)](./img/schema.jpg)