Adding superficial release notes for 2.7.0.1-RC1 to reflect testing state for OSSRH migration

Author: jeremiahjstacey

documentation/esapi4java-core-2.7.1.0-RC1-release-notes.txt

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+Release notes for ESAPI 2.7.1.0-RC1
+    Release date: 2025-30-09
+    Project leaders:
+        -Kevin W. Wall <[email protected]>
+        -Matt Seil <[email protected]>
+
+Previous release: ESAPI 2.7.0.0, 2025-25-06
+
+
+Executive Summary: Important Things to Note for this Release
+------------------------------------------------------------
+This Release Candidate is being used to verify the migration to OSSRH artifact hosting as a part of GitHub issue#891.
+
+This version contains no significant behavioral updates from the 2.7.0.0 release.  
+Keep an eye out for the formal 2.7.0.1 release planned before the end of 2025