fix: typo in git instructions (#58)

closes #57

Author: galenlynch

docs/source/acquire_upload/prepare_before_acquisition.md

@@ -359,7 +359,7 @@ If you want to store your Instrument metadata file in the Scientific Computing m
 
 Note that you must currently have the `release-v1.0.0` branch of `aind-metadata-mapper` installed:
 ```bash
-git checkout https://github.com/AllenNeuralDynamics/aind-metadata-mapper.git
+git clone https://github.com/AllenNeuralDynamics/aind-metadata-mapper.git
 cd aind-metadata-mapper
 git checkout release-v1.0.0
 conda create -n instrument_uploader # or whatever you want your env to be called
@@ -494,4 +494,4 @@ Standardized procedures that are performed by NSB (link?) are uploaded and acces
   });
 })();
 </script>
-```
+```