Merge pull request #3314 from dtrudg/prep-4.2.1

chore: prep 4.2.1 release

Author: dtrudg

CHANGELOG.md

@@ -1,6 +1,6 @@
 # SingularityCE Changelog
 
-## Changes Since Last Release
+## 4.2.1 \[2024-09-13\]
 
 ### Bug Fixes
 

INSTALL.md

@@ -201,11 +201,11 @@ cd singularity
 By default your clone will be on the `main` branch which is where development
 of SingularityCE happens. To build a specific version of SingularityCE, check
 out a [release tag](https://github.com/sylabs/singularity/tags) before
-compiling. E.g. to build the 4.2.0 release, checkout the
-`v4.2.0` tag:
+compiling. E.g. to build the 4.2.1 release, checkout the
+`v4.2.1` tag:
 
 ```sh
-git checkout --recurse-submodules v4.2.0
+git checkout --recurse-submodules v4.2.1
 ```
 
 ## Compiling SingularityCE
@@ -295,7 +295,7 @@ build and install the RPM like this:
 <!-- markdownlint-disable MD013 -->
 
 ```sh
-export VERSION=4.2.0 # this is the singularity version, change as you need
+export VERSION=4.2.1 # this is the singularity version, change as you need
 
 # Fetch the source
 wget https://github.com/sylabs/singularity/releases/download/v${VERSION}/singularity-ce-${VERSION}.tar.gz