update docs

docs/activation.md

@@ -58,7 +58,7 @@ This process usually takes about 20 minutes but can take up to an hour, dependin
 and how fast the internet is.
 
 If you try to launch a Bubble before the required packer image is ready, your Bubble launcher will detect that the image
-is in the process of being built, and wait until it is ready before trying to use them.
+is in the process of being built, and wait until it is ready before trying to use the image.
 
 [Learn more about Packer images](packer.md).