[releng] Bump version number of p2 repo

This should have been done at the same time as commit:
  677cc2cf634fc56477a11dc114c2a1acfa501326

Change-Id: I1e811eba3882ea0ed08d16fdb828994e153c784a
diff --git a/releng/org.eclipse.cdt-feature/p2.inf b/releng/org.eclipse.cdt-feature/p2.inf
index 37845ea..8e71d42 100644
--- a/releng/org.eclipse.cdt-feature/p2.inf
+++ b/releng/org.eclipse.cdt-feature/p2.inf
@@ -1,3 +1,3 @@
 instructions.configure=\
-org.eclipse.equinox.p2.touchpoint.eclipse.addRepository(location:http${#58}//download.eclipse.org/tools/cdt/releases/9.6,type:0,name:CDT,enabled:false); \
-org.eclipse.equinox.p2.touchpoint.eclipse.addRepository(location:http${#58}//download.eclipse.org/tools/cdt/releases/9.6,type:1,name:CDT,enabled:false); 
+org.eclipse.equinox.p2.touchpoint.eclipse.addRepository(location:http${#58}//download.eclipse.org/tools/cdt/releases/9.7,type:0,name:CDT,enabled:false); \
+org.eclipse.equinox.p2.touchpoint.eclipse.addRepository(location:http${#58}//download.eclipse.org/tools/cdt/releases/9.7,type:1,name:CDT,enabled:false);