Update ecotone-scalar README.md (#9551)

op-chain-ops/cmd/ecotone-scalar/README.md

 # ecotone-scalar
 
 A CLI tool for computing the value of `scalar` to use after the Ecotone upgrade in a call to
-setGasConfig(scalar, overhead) of the L1 SystemConfig contract. After the Ecotone upgrade, the
-overhead parameter is ignored, and the scalar parameter encodes a versioned bytes32 that allows
+`setGasConfig(scalar, overhead)` of the L1 `SystemConfigProxy` contract. After the Ecotone upgrade, the
+overhead parameter is ignored, and the scalar parameter encodes a versioned `bytes32` that allows
 configuring the base fee scalar and blob base fee scalars separately.
 
 #### Usage
 
-Build and run using the [Makefile](../../Makefile) `ecotone-scalar` target. Run `make
-ecotone-scalar` to create a binary in [../../bin/ecotone-scalar](../../bin/ecotone-scalar) that can
+Build and run using the [Makefile](../../Makefile) `ecotone-scalar` target. Inside of `/op-chain-ops`, run:
+```sh
+make ecotone-scalar
+```
+to create a binary in [../../bin/ecotone-scalar](../../bin/ecotone-scalar) that can
 be executed, providing the `--scalar` and `--blob-scalar` flags to specify the base bee scalar and
 blob base fee parameters respectively, for example:
 
 ```sh
-./bin/ecotone-scalar --scalar=100 --blob-scalar=680000
+./bin/ecotone-scalar --scalar=7600 --blob-scalar=862000
 ```