Remove "rigorously" tested

Author: MikeMcC399

README.md

@@ -308,7 +308,7 @@ Each of the architectures for Debian images belong to the Node.js support tier 1
 
 > Experimental: May not compile or test suite may not pass. The core team does not create releases for these platforms. Test failures on experimental platforms do not block releases. Contributions to improve support for these platforms are welcome.
 
-`musl` builds for other architectures, including `arm64`, are not rigorously tested before release.
+`musl` builds for other architectures, including `arm64`, are not tested before release.
 
 ## Yarn v1 Classic bundling