Create ekm_mittelsachsen.yaml (#1531)

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* fixed missing : and ./update_docu_links.py

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Co-authored-by: 5ila5 <5ila5@users.noreply.github.com>

doc/ics/ekm_mittelsachsen_de.md

@@ -0,0 +1,24 @@
+# EKM Mittelsachsen GmbH
+
+EKM Mittelsachsen GmbH is supported by the generic [ICS](/doc/source/ics.md) source. For all available configuration options, please refer to the source description.
+
+
+## How to get the configuration arguments
+
+- Goto <https://www.ekm-mittelsachsen.de/service-dienstleistungen/entsorgungstermine-abfallkalender>
+- Select a year and your location.
+- Right-click on `Digitalen Kalender exportieren` to copy the link.
+- Replace the `url` in the example configuration with this link.
+- Replace the year in the pasted link by {%Y}
+
+## Examples
+
+### Flöha, OT Falkenau
+
+```yaml
+waste_collection_schedule:
+  sources:
+    - name: ics
+      args:
+        url: https://www.ekm-mittelsachsen.de/service-dienstleistungen/entsorgungstermine-abfallkalender?tx_ekmabfallkalender_abfallkalender%5Baction%5D=getIcal&tx_ekmabfallkalender_abfallkalender%5Bcity_id%5D=9886&tx_ekmabfallkalender_abfallkalender%5Bdistrict_id%5D=6871&tx_ekmabfallkalender_abfallkalender%5Byear%5D={%Y}&cHash=fcebd5160307e9c5690f3c7e02dcd869&tx_ekmabfallkalender_abfallkalender[types][]=r&tx_ekmabfallkalender_abfallkalender[types][]=p&tx_ekmabfallkalender_abfallkalender[types][]=l&tx_ekmabfallkalender_abfallkalender[trigger_days]=0
+```