Add CMSSW_15_1_0_pre1 for el8_aarch64_gcc12 (non-production arch) as Development release.

Author: cmsbuild

releases.map

@@ -4541,3 +4541,4 @@ architecture=el8_amd64_gcc12;label=CMSSW_15_0_1;type=Production;state=Announced;
 architecture=el8_amd64_gcc13;label=CMSSW_15_0_1;type=Production;state=Announced;prodarch=0;default_micro_arch=x86-64-v3;
 architecture=el9_aarch64_gcc12;label=CMSSW_15_0_1;type=Production;state=Announced;prodarch=0;
 architecture=el9_amd64_gcc12;label=CMSSW_15_0_1;type=Production;state=Announced;prodarch=0;default_micro_arch=x86-64-v3;
+architecture=el8_aarch64_gcc12;label=CMSSW_15_1_0_pre1;type=Development;state=Announced;prodarch=0;