install-from-source(mariner): ensure that CA certificates are installed

This seems to be necessary to avoid problems with the `curl` calls when
`dotnet-install.sh` tries to download the `dotnet-sdk` TAR archive:

	dotnet-install: Attempting to download using aka.ms link https://dotnetcli.azureedge.net/dotnet/Sdk/8.0.403/dotnet-sdk-8.0.403-linux-x64.tar.gz
	curl: (60) SSL certificate problem: unable to get local issuer certificate
	More details here: https://curl.se/docs/sslcerts.html
	curl failed to verify the legitimacy of the server and therefore could not
	establish a secure connection to it. To learn more about this situation and
	how to fix it, please visit the web page mentioned above.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

src/linux/Packaging.Linux/install-from-source.sh

@@ -228,7 +228,7 @@ case "$distribution" in
         $sudo_cmd tdnf update -y
 
         # Install dotnet/GCM dependencies.
-        install_packages tdnf install "curl git krb5-libs libicu openssl-libs zlib findutils which bash awk"
+        install_packages tdnf install "curl ca-certificates git krb5-libs libicu openssl-libs zlib findutils which bash awk"
 
         ensure_dotnet_installed
     ;;