Update README.md (#11474)

Corrected a typo in the sentence: "`op-geth` embeds upstream geth’s version inside its own version..."

README.md

@@ -104,7 +104,7 @@ Tags of the form `v<semver>`, such as `v1.1.4`, indicate releases of all Go code
 This naming scheme is required by Golang.
 In the above list, this means these `v<semver` releases contain all `op-*` components and exclude all `contracts-*` components.
 
-`op-geth` embeds upstream geth’s version inside it’s own version as follows: `vMAJOR.GETH_MAJOR GETH_MINOR GETH_PATCH.PATCH`.
+`op-geth` embeds upstream geth’s version inside its own version as follows: `vMAJOR.GETH_MAJOR GETH_MINOR GETH_PATCH.PATCH`.
 Basically, geth’s version is our minor version.
 For example if geth is at `v1.12.0`, the corresponding op-geth version would be `v1.101200.0`.
 Note that we pad out to three characters for the geth minor version and two characters for the geth patch version.