Version bump for 4.21

Needed by
https://git.eclipse.org/r/c/platform/eclipse.platform.debug/+/172237

Change-Id: I3792168701bc52e60cc5e9a470dc2ba5bce34129
Signed-off-by: Alexander Kurtakov <akurtako@redhat.com>
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.debug/+/183213
Tested-by: Platform Bot <platform-bot@eclipse.org>

org.eclipse.core.variables/META-INF/MANIFEST.MF

diff --git a/org.eclipse.core.variables/META-INF/MANIFEST.MF b/org.eclipse.core.variables/META-INF/MANIFEST.MF
index eb6f02b..0e99308 100644
--- a/org.eclipse.core.variables/META-INF/MANIFEST.MF
+++ b/org.eclipse.core.variables/META-INF/MANIFEST.MF
@@ -2,7 +2,7 @@
 Bundle-ManifestVersion: 2
 Bundle-Name: %pluginName
 Bundle-SymbolicName: org.eclipse.core.variables; singleton:=true
-Bundle-Version: 3.5.0.qualifier
+Bundle-Version: 3.5.100.qualifier
 Bundle-Activator: org.eclipse.core.variables.VariablesPlugin
 Bundle-Vendor: %providerName
 Bundle-Localization: plugin