Add missing changelog items since 1.1.0

changelog.d/20240202_081451_michael.hanke.md

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+### 🐛 Bug Fixes
+
+- Fix an invalid escape sequence in a regex that caused a syntax warning.
+  Fixes https://github.com/datalad/datalad-next/issues/602 via
+  https://github.com/datalad/datalad-next/pull/603 (by @mih)

changelog.d/20240202_081610_michael.hanke.md

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+### 💫 Enhancements and new features
+
+- Speed up of status reports for repositories with many submodules.
+  An early presence check for submodules skips unnecessary evaluation
+  steps. Fixes https://github.com/datalad/datalad-next/issues/606 via
+  https://github.com/datalad/datalad-next/pull/607 (by @mih)

changelog.d/20240202_081822_michael.hanke.md

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+### 🏠 Internal
+
+- Fix implementation error in `ParamDictator` class that caused a test
+  failure. The class itself is unused and has been scheduled for removal.
+  See https://github.com/datalad/datalad-next/issues/611 and
+  https://github.com/datalad/datalad-next/pull/610 (by @christian-monch)