Fix name of gerrit_monitoring.py script in README.md

Change-Id: I1bf67dd6dcf54114db2796fdc8d32693ce684874
diff --git a/README.md b/README.md
index 26138b8..47a43e2 100644
--- a/README.md
+++ b/README.md
@@ -195,7 +195,7 @@
 e.g. with the CI-system, it is meant to be encrypted. The encryption is explained
 [here](./documentation/config-management.md).
 
-The `gerrit-monitoring.py install`-command will decrypt the file before templating,
+The `gerrit_monitoring.py install`-command will decrypt the file before templating,
 if it was encrypted with `sops`.
 
 ## Installation
@@ -210,7 +210,7 @@
 it, run:
 
 ```sh
-pipenv run python ./gerrit-monitoring.py \
+pipenv run python ./gerrit_monitoring.py \
   --config config.yaml \
   install \
   [--output ./dist] \
@@ -273,11 +273,11 @@
 kubectl delete -f ./dist/namespace.yaml
 ```
 
-The `./gerrit-monitoring.py uninstall`-script will automatically remove the
+The `./gerrit_monitoring.py uninstall`-script will automatically remove the
 charts installed in the configured namespace and delete the namespace as well:
 
 ```sh
-pipenv run python ./gerrit-monitoring.py \
+pipenv run python ./gerrit_monitoring.py \
   --config config.yaml \
   uninstall
 ```