Bump scitokens-cpp .so version

[brianhlin]

We ran into issues at a site running XRootD 5.6.3 with scitokens-cpp-0.7.3-1.el8.x86_64:

Plugin /lib64/libXrdAccSciTokens-5.so: undefined symbol: scitoken_config_set_str authlib libXrdAccSciTokens-5.so

XRootD BuildRequires: scitokens-cpp-devel which results in the following requirement:

[blin@ap22 ~]$ rpm -q xrootd-scitokens
xrootd-scitokens-5.6.3-1.2.osg23.el8.x86_64
[blin@ap22 ~]$ rpm -q --requires xrootd-scitokens | head -n1
libSciTokens.so.0()(64bit)

This is unfortunately satisfied by 0.7.3 so Yum doesn't automatically pull in the actually required version of at least v1.0.2