Update CHANGELOG and README for v2.0.0-RC1

Relates #85

Author: ttddyy

CHANGELOG

@@ -1,6 +1,10 @@
 Datasource Micrometer Changelog
 ================================
 
+2.0.0-RC1
+------------------
+* Support Spring Boot 4.0.0-M3 (#78)
+
 1.2.0
 ------------------
 * Fix closing order of scope and observation (#79)

README.md

@@ -108,7 +108,8 @@ The produced jars support following JDK versions at runtime:
 
 | DataSource Micrometer | Spring Boot  | Micrometer Tracing BOM | Micrometer BOM |
 |:---------------------:|:------------:|:----------------------:|:--------------:|
-|      `1.0.0`          | 3.0.0 and up |         1.0.0          |     1.10.2     | 
+|      `2.0.0-RC1`      |   4.0.0-M3   |        1.6.0-M3        |   1.16.0-M3    | 
+|        `1.0.0`        | 3.0.0 and up |         1.0.0          |     1.10.2     | 
 |      `1.0.0-RC1`      |  3.0.0-RC1   |       1.0.0-RC1        |   1.10.0-RC1   | 
 |      `1.0.0-M1`       |   3.0.0-M6   |        1.0.0-M8        |   1.10.0-M5    |